S1	What is the relationship between bullying and suicide among teenagers?	Results: (0)
S2	bullying and suicide and (teenagers or adolescents)	Results: (44)
S3	(bullying or harassment or cyberbullying) and suicide and (teenagers or teens or adolescents or adolescence)	(64)
S4	(bully* or harass* or cyberbully*) and suicid* and (teen* or adolescen*)	Results: (91)

Now, let's try using subject headings:

Our results are much smaller, but theoretically every item should be focussed on our topic.