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