Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
sang minh » kang minah, anh minh, song min
chan ming » kian ming, chan eng, chan fong
hong ghi » zhong zhi, hong g, hong hai
xi ai » ai ai, ii ai, vi ai
i ai » ai ai, i aim, i ais

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong yang) or (yang yang)) ((xi ai) or (i ai)) gene ((sang minh) or (chan ming)) hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (yang yang)) ((xi ai) OR (i ai)) gene ((sang minh) OR (chan ming)) hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (yang yang)) ((xi ai) or (i ai)) gene ((sang minh) or (chan ming)) hong ghi ;*.