Perhaps you should try some spelling variations:
gender class » gender biases, gender bias
gender luong » gender land, gender low
gender lens » gender blind
thanh done » than done, than one
wang man » wang yan, wang ban, wang dan
man can » man han, woman can, man kann
can a » can _
mail » main

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang man can a ((gender luong) or (((gender lens) OR (gender class)))) thanh done mail ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang man can a ((gender luong) OR (((gender lens) OR (gender class)))) thanh done mail ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang man can a ((gender luong) or (((gender lens) OR (gender class)))) thanh done mail ;".
• Adding a wildcard symbol may retrieve word variants: wang man can a ((gender luong) or (((gender lens) OR (gender class)))) thanh done mail ;*.