Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
eng chung » fung chung, kung chung, tung chung
yang yan » wang yan, yang fan, yang yao
yi cheng » yu cheng, xi cheng, yi chang
chan eng » chan fong, chan kang, chan ming
yi chen » jui chen
chung h » chun h, chung _, chung hee

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yang yan) OR (yang yang)) ((yi chen) or (yi cheng)) chan eng chung h ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yang yan) OR (yang yang)) ((yi chen) OR (yi cheng)) chan eng chung h ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang yan) OR (yang yang)) ((yi chen) or (yi cheng)) chan eng chung h ;*".