Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
yang amin » yang jin, yang lin, yang mind
amin hong » min hong, among hong, tin hong
hua gene » a gene, hua ren, hy5 gene
hong ghi » zhong zhi, hong g, hong hai

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

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