Dear Ray
It seems that when I am trying to create a separate page for exact match then it is showing another kind of problem.
I was trying to do an "exact search" on the server which page name is http://search.hadithbd.com/exact-search.php and now it shows memory error like below.
Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 20480 bytes) in /home1/x0g1kgnj/search.hadithbd.com/webassist/mysqli/rsobj.php on line 198