MySQL full text search result problem
Your query is looking for the token = 'Baha'. You need a wildcard search for 'Baha*'.

Please try the following

SELECT
MATCH (`e`.`firstname`, `e`.`lastname`, `e`.`tc_identity`) AGAINST ('Baha*') AS `Score`,
`e`.*

FROM
`employees` AS `e`

WHERE
MATCH (`e`.`firstname`, `e`.`lastname`, `e`.`tc_identity`) AGAINST ('Baha*' IN BOOLEAN MODE)

ORDER BY `Score` DESC