Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
yan liang » yang liang, wang liang, you liang
dang hari » dang hai
hua gain » run gain, hua ban, via gain
yang jin » yang jun, ying jin, shang jin
yang jie » yang di, yang jui, yang xi
man tan » man can, man han, man tun
woran » woman, moran, goran

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

• Performing a fuzzy search may retrieve terms with similar spellings: woran man tan ((hua gain) OR (heat gain)) ((yan liang) or (((yang jin) or (yang jie)))) dang hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: woran man tan ((hua gain) OR (heat gain)) ((yan liang) OR (((yang jin) OR (yang jie)))) dang hari ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "woran man tan ((hua gain) OR (heat gain)) ((yan liang) or (((yang jin) or (yang jie)))) dang hari ;".
• Adding a wildcard symbol may retrieve word variants: woran man tan ((hua gain) OR (heat gain)) ((yan liang) or (((yang jin) or (yang jie)))) dang hari ;*.