problem with '-' and '&' string in mysql

[ThePresident]

I have a search engine in PHP. When a search normally it's OK. Search text is 'company', and in the database there is 'company' in the field...The problem is when the search text is \[code\]&company\[/code\] or \[code\]-company\[/code\] and the data is \[code\]&company\[/code\] or \[code\]-company\[/code\] there is no match. why?problem with the \[code\]-\[/code\] and \[code\]&\[/code\] string...