Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
gene pang » gene bank, gene part
lang yan » wang yan, wang yang, yang yang
pang jun » yang jui
jun wong » john wong
wong sau » wong sam, wong siu, wong shiu
yan hua » tan hua, ya hua, tuan 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) OR (zhang yan)) ((yan hua) or (wang hua)) gene pang jun wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((lang yan) OR (zhang yan)) ((yan hua) OR (wang hua)) gene pang jun wong sau ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) OR (zhang yan)) ((yan hua) or (wang hua)) gene pang jun wong sau ;*".