Perhaps you should try some spelling variations:
dong huang » dong hoang, dang hung, dong hua
huang alan » huang allen, huang juan, huang lin
hua gene » human gene, hua ren, hy5 gene
ying jin » yang jin, jing ji, yang jie
hong shu » cong shu, tong shui, wong shiu
yan jiu » yang jie, yang jin, pang jiu
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 huang alan ((hua gene) OR (a gene)) ((yan jiu) or (ying jin)) hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong huang alan ((hua gene) OR (a gene)) ((yan jiu) OR (ying jin)) hong shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong huang alan ((hua gene) OR (a gene)) ((yan jiu) or (ying jin)) hong shu ;".
• Adding a wildcard symbol may retrieve word variants: dong huang alan ((hua gene) OR (a gene)) ((yan jiu) or (ying jin)) hong shu ;*.