Perhaps you should try some spelling variations:
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling
malawi a » malawi _
ying jin » yang jin, jing ji, yang jie
new main » new spain, new math
wong yue » wang yue, hong yu
a gene » a genre, a gender, a gentle

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 (wang yang)) malawi a gene ((((ying jin) OR (yang di))) OR (new main)) wong yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) OR (wang yang)) malawi a gene ((((ying jin) or (yang di))) or (new main)) wong yue ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) OR (wang yang)) malawi a gene ((((ying jin) or (yang di))) or (new main)) wong yue ;*.