Linking 2 or more concepts with AND narrows searches to a specific context: race AND class AND power.
This search returns content that includes racism and coping OR racism and adaptation
Linking synonyms with OR tells the database you want articles containing any of these similar terms.
The asterisk also captures articles you might otherwise miss. For instance, islam* will return articles with the words islam, islamic, islamist, islamaphobia; stereotyp* will return articles with the words stereotype, stereotypes, stereotyped, stereotypical, stereotyping.
Look for potentially useful synonyms in the titles, abstracts, and subject headings of articles