Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
yang chik » nong chik, wang chi
wing yan » wang yan, wing ian, wing tan
hua gene » a gene, hua ren, hy5 gene
hong hai » shang hai, zhong tai, dang hai
yan yi » yang yi, tan yi, yan zi
tan » than

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing yan yi ((hua gene) OR (human gene)) ((yang chik) or (yang judy)) ((hong hai) or (hong tan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing yan yi ((hua gene) OR (human gene)) ((yang chik) OR (yang judy)) ((hong hai) OR (hong tan)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wing yan yi ((hua gene) OR (human gene)) ((yang chik) or (yang judy)) ((hong hai) or (hong tan)) ;*".