Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
congo can » congo call, cong van, congo a
anh mine » anh minh, land mine, a mine
cong seo » hong seo, cong shu, cong sun
yang xi » yang di, yang yi, yang jui
a genre » _ genre, a gender, a gentle
a gene » a gender, a gentle, a geneve

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang yang xi ((a gene) or (a genre)) anh mine ((cong seo) or (congo can)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yang xi ((a gene) OR (a genre)) anh mine ((cong seo) OR (congo can)) ;*.