Perhaps you should try some spelling variations:
bhutan gender » human gender, rhoton gender
16 bhutan » 2016 bhutan, _ bhutan
sitz kong » sing kong
kong guan » thong guan
yang jui » yang xi, yang yi
gender a » gender _
a sitz » a site, a sita, als sitz
n 16 » nr 16, n 156, n 169

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: ((((yang judy) OR (yang jui))) OR (yang di))n 16 bhutan gender a sitz kong guan ;~.
• Adding a wildcard symbol may retrieve word variants: ((((yang judy) or (yang jui))) or (yang di))n 16 bhutan gender a sitz kong guan ;*.