Perhaps you should try some spelling variations:
gene sang » lee sang, gene bank
yang yang » wang yang, wang yan
sang minh » kang minah, anh minh, song min
cong seo » hong seo, cong shu, cong sun
cong van » congo can, duong van, cong sun
xi a » xi ai, i a, ai a
ii a » ii _, ii 1, i a

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