Perhaps you should try some spelling variations:
yang yama » yang yao, yang maha, yang yera
yang yang » wang yang, wang yan
huang lin » huang bin, huang jing, huang ting
hua gene » human gene, hua ren, hy5 gene
yang jie » yang jin, yang di, yang jui
hong ghi » zhong zhi, hong g, hong hai
a gene » a genre, a gender, a gentle

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((yang yama) OR (yang yang)) ((hua gene) or (a gene)) ((huang lin) or (yang jie)) hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((yang yama) OR (yang yang)) ((hua gene) OR (a gene)) ((huang lin) OR (yang jie)) hong ghi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((yang yama) OR (yang yang)) ((hua gene) or (a gene)) ((huang lin) or (yang jie)) hong ghi ;".
• Adding a wildcard symbol may retrieve word variants: dong ((yang yama) OR (yang yang)) ((hua gene) or (a gene)) ((huang lin) or (yang jie)) hong ghi ;*.