hi , i had these problem with my website prestashop 1.6.0.14 after many changes with no results , i had an ideea to put in preferences / search in BO , max lengh search to 0 and is working well now and i think it takes modification because i changed this too , search.php from classes
? ' \''.pSQL(Tools::substr($word, 1, PS_SEARCH_MAX_WORD_LENGTH)).'%\''
: '\''.pSQL(Tools::substr($word, 0, PS_SEARCH_MAX_WORD_LENGTH)).'%\''
CHange it to
? ' \'%'.pSQL(Tools::substr($word, 1, PS_SEARCH_MAX_WORD_LENGTH)).'%\'' : '\'%'.pSQL(Tools::substr($word, 0, PS_SEARCH_MAX_WORD_LENGTH)).'%\''