Perhaps you should try some spelling variations:
dong hoang » hong hong
yang yang » wang yang, wang yan
sang minh » kang minah, anh minh, song min
tang min » chang min, yang mind, tang li
hong ghi » zhong zhi, hong g, hong hai
vi ai » vi a, ai ai, ii 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 hoang) or (yang yang)) ((vi ai) or (i ai)) gene ((sang minh) or (tang min)) hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (yang yang)) ((vi ai) OR (i ai)) gene ((sang minh) OR (tang min)) hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: ((dong hoang) or (yang yang)) ((vi ai) or (i ai)) gene ((sang minh) or (tang min)) hong ghi ;*.