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
tang min » chang min, yang mind, tang li
hong ghi » zhong zhi, hong g, hong hai
ai gene » a1 gene, i gene, iii gene
a gene » a genre, a gender, a gentle

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 gene) OR (a gene)) ((sang minh) or (tang min)) hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (yang yang)) xi ((ai gene) OR (a gene)) ((sang minh) OR (tang min)) hong ghi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (yang yang)) xi ((ai gene) OR (a gene)) ((sang minh) or (tang min)) hong ghi ;".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (yang yang)) xi ((ai gene) OR (a gene)) ((sang minh) or (tang min)) hong ghi ;*.