Perhaps you should try some spelling variations:
dong hoang » hong hong
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
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) OR (wang 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) OR (wang yang)))) ka hua gene yang lin zong ghi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong hoang) or (((yang yang) OR (wang yang)))) ka hua gene yang lin zong ghi ;".
• Adding a wildcard symbol may retrieve word variants: ((dong hoang) or (((yang yang) OR (wang yang)))) ka hua gene yang lin zong ghi ;*.