Search by keywords/phrases and use Boolean searching. What's Boolean?
AND: pornography AND couples
OR: porn* OR "sexually explicit material*"
Using "Quotation Marks" searches words as a phrase.
Limit search results by Date and Peer-Reviewed journals.
Truncation searches variations of a word. The symbol used is asterisk *.
COUNSEL* will retrieve: counsel, counseling, counselor, counselors, etc.
Check Subject terms to see if there are any synonym terms to consider.