Perhaps you should try some spelling variations:
shang hai » shang kai, dang hai, chang ha
yang yun » yang jun, tang yun, yang yue
tan yang » dan yang, tan ying, tan yong
hang hai » dang hai, hong hai, zhang han
yan kun » yan guan, yan yuan
wang » wing, wan, lang
ngai » ngau, nga, nai

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: wang hyoung ((yan kun) OR (yang yun)) tan yang ngai ((hang hai) OR (shang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung ((yan kun) or (yang yun)) tan yang ngai ((hang hai) OR (shang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang hyoung ((yan kun) or (yang yun)) tan yang ngai ((hang hai) OR (shang hai)) ;*.