Perhaps you should try some spelling variations:
guifang yang » cuifen yang, huang yang
human gene » human genome, human gender, human bone
wang yang » wang yan, wang liang, wang yanling
yang hong » wang hong, yang hongli, quang hong
hua gene » a gene, hua ren, hy5 gene
hong shu » cong shu, tong shui, wong shiu
dong » doing, long, done

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong guifang yang ((hua gene) OR (human gene)) wang yang hong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong guifang yang ((hua gene) OR (human gene)) wang yang hong shu ;*".