BB-code tags shouldn't be returned as results of Search

The user expects the following behavior:
Enter any request similar to BB-code tags (f.ex. highlight)
AR: among the Search results the topics where Highlight BB-Code has been used are returned
ER: only those topics, where the user can actually see the word highlight typed in text field/topic name are supposed to be returned as results of Search (not including topics with Highlight BB-Code)