Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
yan liang » yang liang, wang liang, you liang
shang hai » shang kai, dang hai, chang ha
wenn man » kann man, wenn das
ann heat » a heat
ying jin » yang jin, jing ji, yang jie
man ann » man kann

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: wenn man ann heat gain ((yan liang) OR (ying jin)) shang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wenn man ann heat gain ((yan liang) or (ying jin)) shang hai ;*.