Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
yan tuan » yan guan, yan yuan, anh tuan
hua gain » run gain, hua ban, via gain
yang lin » yang jin, wang lin, yang liang
song hai » hong hai, shang hai, dang hai
yang li » yang di, yang yi, tang li
yang xi » yang di, yang yi, yang jui
wang » wing, wan, lang

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

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