Perhaps you should try some spelling variations:
yang sang » yang guang, yang liang, yang using
yang yang » wang yang, wang yan
shang hai » shang kai, dang hai, chang ha
tuan hua » tan hua, tuan vu, yuan hui
hua gain » heat gain, run gain, hua ban
hong hai » zhong tai, dang hai, hong tan
yang li » yang lin, yang xi, yang yi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang sang) or (yang yang)) tuan hua gain ((yang di) or (yang li)) ((hong hai) OR (shang hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang sang) OR (yang yang)) tuan hua gain ((yang di) OR (yang li)) ((hong hai) OR (shang hai)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang sang) or (yang yang)) tuan hua gain ((yang di) or (yang li)) ((hong hai) OR (shang hai)) ;".
• Adding a wildcard symbol may retrieve word variants: ((yang sang) or (yang yang)) tuan hua gain ((yang di) or (yang li)) ((hong hai) OR (shang hai)) ;*.