Perhaps you should try some spelling variations:
"anthropology david" » "anthropologist david", "anthropology chavin", "anthropology asia"
"anthropology based" » "anthropology fast", "anthropology bicssc", "anthropology early"
"anthropology aat" » "anthropology anth", "anthropology fast", "anthropology a"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("anthropology aat") OR ((("anthropology david") OR ("anthropology based")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"anthropology aat\") or (((\"anthropology david\") OR (\"anthropology based\"))))".
• Removing quotes may allow a broader search: (( anthropology aat ) or ((( anthropology david ) OR ( anthropology based )))).
• Adding a wildcard symbol may retrieve word variants: (("anthropology aat") or ((("anthropology david") OR ("anthropology based"))))*.