Perhaps you should try some spelling variations:
lang hyoung » wang hyoung, kang young, hwang byoung
hyoung yan » kyoung yang, hyoung gun, kyoung yun
xiao zhang » xiabo zhang, hao zhang, jia zhang
gain yang » dan yang, tan yang, yin yang
daun yang » dan yang, du yang, tan yang
xi zhang » li zhang, bin zhang, jia zhang
yan yun » yan yuan, yang yun, yan kun

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

• If you are trying to use Boolean operators, they must be ALL CAPS: lang hyoung yan yun ((gain yang) OR (daun yang)) ((xi zhang) OR (xiao zhang)) hay ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang hyoung yan yun ((gain yang) or (daun yang)) ((xi zhang) OR (xiao zhang)) hay ;~".
• Adding a wildcard symbol may retrieve word variants: lang hyoung yan yun ((gain yang) or (daun yang)) ((xi zhang) OR (xiao zhang)) hay ;*.