Perhaps you should try some spelling variations:
dong hoang » hong hong
chuan gene » human gene
yang yang » wang yang, wang yan
gene wang » gene bank, wen wang
ka chuan » say chuan, hai chuan, ka chai
wang lin » wang li, wang qin, yang lin
zong ghi » zong he
hong ghi » zhong zhi, hong g, hong hai

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 chuan gene wang lin ((zong ghi) OR (hong ghi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (yang yang)) ka chuan gene wang lin ((zong ghi) OR (hong ghi)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong hoang) or (yang yang)) ka chuan gene wang lin ((zong ghi) OR (hong ghi)) ;*".