Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
gene sang » lee sang, gene bank
sang minh » kang minah, anh minh, song min
duong van » cong van, duong anh
cong seo » hong seo, cong shu, cong sun
yang yi » yang di, yang jui
yang xi » yang di, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang ((yang yi) OR (yang xi)) human gene sang minh ((cong seo) or (duong van)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang ((yang yi) OR (yang xi)) human gene sang minh ((cong seo) OR (duong van)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang ((yang yi) OR (yang xi)) human gene sang minh ((cong seo) or (duong van)) ;".
• Adding a wildcard symbol may retrieve word variants: yang ((yang yi) OR (yang xi)) human gene sang minh ((cong seo) or (duong van)) ;*.