Perhaps you should try some spelling variations:
clone thanh » long thanh
chan eng » chan fong, chan kang, chan ming
eng yang » ng yang, wang yang, yang yang
van paul » von paul, jean paul, chan paul
jan paul » jean paul, von paul
xi gene » iii gene
i gene » _ gene, a gene, e gene

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

• Performing a fuzzy search may retrieve terms with similar spellings: chan eng yang ((xi gene) OR (i gene)) clone thanh ((van paul) or (((jan paul) or (john paul)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chan eng yang ((xi gene) OR (i gene)) clone thanh ((van paul) OR (((jan paul) OR (john paul)))) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chan eng yang ((xi gene) OR (i gene)) clone thanh ((van paul) or (((jan paul) or (john paul)))) ;*".