Perhaps you should try some spelling variations:
than china » tuan china, han china, wuhan china
gene yang » gene bank
tan chia » tuan china, can china, dan china
yan hua » ya hua, wang hua, tuan hua
tan hua » tuan hua, wang hua, tan puay
yang xi » yang di, yang yi, yang jui
xi wong » kie wong
wang » wing, wan, lang
lai » laid

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan ((((yan hua) or (tan hua))) or (((tan chia) OR (than china)))) gene yang xi wong lai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((((yan hua) OR (tan hua))) OR (((tan chia) OR (than china)))) gene yang xi wong lai ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((((yan hua) or (tan hua))) or (((tan chia) OR (than china)))) gene yang xi wong lai ;".
• Adding a wildcard symbol may retrieve word variants: wang yan ((((yan hua) or (tan hua))) or (((tan chia) OR (than china)))) gene yang xi wong lai ;*.