Perhaps you should try some spelling variations:
dong hoang » hong hong
yang yang » wang yang, wang yan
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang lin » yang jin, wang lin, yang li
lin zong » lin ling, lin meng
zong ghi » hong ghi, zong he
ka hua » ya hua, ka chuan

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)) ka hua gene yang lin zong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (yang yang)) ka hua gene yang lin zong ghi ;*.