Perhaps you should try some spelling variations:
bhutan gender » human gender, rhoton gender
gender case » gender caste, gender based, gender class
wang liang » wang yang
3 bhutan » _ bhutan, 3.2 bhutan, 16 bhutan
case thi » case two
thi hong » tan hong
hong gun » hyoung gun, thong guan, hong gang
yang yi » yang xi, yang jui
ngs 3 » wgs 3

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((wang liang) or (yang yi))) or (yang di))ngs 3 bhutan gender case thi hong gun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wang liang) OR (yang yi))) OR (yang di))ngs 3 bhutan gender case thi hong gun ;.
• Adding a wildcard symbol may retrieve word variants: ((((wang liang) or (yang yi))) or (yang di))ngs 3 bhutan gender case thi hong gun ;*.