Perhaps you should try some spelling variations:
gain yang » dan yang, daun yang, tan yang
yun gain » run gain, you gain, n gain
hang hai » shang hai, dang hai, zhang han
hong hai » shang hai, zhong tai, dang hai
nan yan » nan ya, wang yan, qian yan
yan yun » yan yuan, yang yun, yan kun
wang » wing, wan
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 OR lang) nan yan yun gain yang ngai ((hang hai) OR (hong hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or lang) nan yan yun gain yang ngai ((hang hai) OR (hong hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or lang) nan yan yun gain yang ngai ((hang hai) OR (hong hai)) ;*.