Perhaps you should try some spelling variations:
yang july » yang judy, yang jui
lang yan » wang yan, wang yang, zhang yan
hua gene » human gene, a gene, hua ren
yang jun » yang jui, pang jun, yang judy
yang jin » yang jie, ying jin, shang jin
wong sau » wong sam, wong siu, wong shiu
yan yan » yan yuan, nan yan, yang yang
yan hua » tan hua, ya hua, wang hua

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan yan hua gene ((((yang jun) or (yang jin))) or (yang july)) wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan yan hua gene ((((yang jun) OR (yang jin))) OR (yang july)) wong sau ;*.