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

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: ((yang sang) OR (((yang yang) OR (wang yang)))) tuan hua gain ((yang di) OR (yang li)) hong hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang sang) or (((yang yang) OR (wang yang)))) tuan hua gain ((yang di) or (yang li)) hong hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((yang sang) or (((yang yang) OR (wang yang)))) tuan hua gain ((yang di) or (yang li)) hong hai ;*.