mysql> SELECT text FROM table;
+-------------------------------------------------------+
| text                                                 |
+-------------------------------------------------------+
| vörvaň prostý                                      |
| lezevec prostý                                       |
| lezevec obecný                                       |
| jezevec obecný                                       |
| jezevec žlutý                                       |
| vorvaň prostý                                       |
| vorvan prostý                                        |
+-------------------------------------------------------+
8 rows in set (0.00 sec)

mysql> SELECT text, MATCH (text) AGAINST ('vorvan') AS rel FROM table;
+-------------------------------------------------------+------+
| text                                                 | rel  |
+-------------------------------------------------------+------+
| vörvaň prostý                                      |    0 |
| lezevec prostý                                       |    0 |
| lezevec obecný                                       |    0 |
| jezevec obecný                                       |    0 |
| jezevec žlutý                                       |    0 |
| vorvaň prostý                                       |    0 |
| vorvan prostý                                        |    0 |
+-------------------------------------------------------+------+
8 rows in set (0.21 sec)

mysql> SELECT text, MATCH (text) AGAINST ('vorvaň') AS rel FROM table;
+-------------------------------------------------------+------+
| text                                                 | rel  |
+-------------------------------------------------------+------+
| vörvaň prostý                                      |    0 |
| lezevec prostý                                       |    0 |
| lezevec obecný                                       |    0 |
| jezevec obecný                                       |    0 |
| jezevec žlutý                                       |    0 |
| vorvaň prostý                                       |    0 |
| vorvan prostý                                        |    0 |
+-------------------------------------------------------+------+
8 rows in set (0.00 sec)

mysql> SELECT text, MATCH (text) AGAINST ('vörvaň') AS rel FROM table;
+------------------+---------------------+
| text            | rel                 |
+------------------+---------------------+
| vörvaň prostý |    0.28121414780617 |
| lezevec prostý  |                   0 |
| lezevec obecný  |                   0 |
| jezevec obecný  |                   0 |
| jezevec žlutý  |                   0 |
| vorvaň prostý  | 7.1162265153097e+34 |
| vorvan prostý   |   0.080910585820675 |
+------------------+---------------------+
7 rows in set (0.00 sec)

mysql> INSERT INTO table (text) VALUES ('prosty');
Query OK, 1 row affected (0.11 sec)

mysql> SELECT text, MATCH (text) AGAINST ('prosty') AS rel FROM encyklopedie;
+------------------+------+
| text            | rel  |
+------------------+------+
| vörvaň prostý |    0 |
| lezevec prostý  |    0 |
| lezevec obecný  |    0 |
| jezevec obecný  |    0 |
| jezevec žlutý  |    0 |
| prosty           |    0 |
| vorvaň prostý  |    0 |
| vorvan prostý   |    0 |
+------------------+------+
8 rows in set (0.00 sec)

mysql> SELECT text, MATCH (text) AGAINST ('Žlutý') AS rel FROM encyklopedie;
+------------------+----------------+
| text            | rel            |
+------------------+----------------+
| vörvaň prostý |              0 |
| lezevec prostý  |              0 |
| lezevec obecný  |              0 |
| jezevec obecný  |              0 |
| jezevec žlutý  | 1.902160525322 |
| prosty           |              0 |
| vorvaň prostý  |              0 |
| vorvan prostý   |              0 |
+------------------+----------------+
8 rows in set (0.00 sec)

mysql> SELECT text, MATCH (text) AGAINST ('pröstý') AS rel FROM encyklopedie;
+------------------+------+
| text            | rel  |
+------------------+------+
| vörvaň prostý |    0 |
| lezevec prostý  |    0 |
| lezevec obecný  |    0 |
| jezevec obecný  |    0 |
| jezevec žlutý  |    0 |
| prosty           |    0 |
| vorvaň prostý  |    0 |
| vorvan prostý   |    0 |
+------------------+------+
8 rows in set (0.00 sec)