Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
gene sang » lee sang, gene bank
sang minh » kang minah, anh minh, song min
congo can » congo call, congo a, congo war
hui gene » hy5 gene, i gene, iii gene
cong van » duong van, cong sun
yang yi » yang di, yang xi, yang jui
yi hui » li hui

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