Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
yan liang » yang liang, wang liang, you liang
dang hadi » dang hai
wenn man » kann man, wenn das
han heat » a heat, can hear, lag heat
yang jin » yang jie, yang jun, ying jin
man han » man hat, man can, 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 han heat gain ((yan liang) OR (yang jin)) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: wenn man han heat gain ((yan liang) or (yang jin)) dang hadi ;*.