Macro Research Tips:
"Iterate" - "perform
or utter repeatedly." Modify and repeat searches until you find what you want. Determine optimal search settings.
"Terminology" - Determine if there is specialized terminology or vocabulary for your topic. What's the "insider language"? Consider potential variations on the terms you use to search; think about synonyms.
"Like begets like" OR "One good source leads to another"- "Mine" citations: a work on your topic may cite other works on your topic.
Micro Research Tips a.k.a search mechanics:
Group search strings with quotation marks. It's possible to use multiple groups.
Use filters and linkages to narrow or focus results
Search inside an electronic source
What are some synonyms for your topic or terms in your topic?
Is there insider language or terminology for your topic that one would need to know to find resources on the topic?
Does your topic fall within a specific subdiscipline of philosophy? If so, which?
Take a moment to write down synonyms, insider language, or alternate terminology.