Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
yan liang » yang liang, wang liang, you liang
shang kai » shang hai
wenn das » wenn die
han heat » a heat, can hear, lag heat
ying jin » yang jin, jing ji, yang jie
das han » das hal, das haben, das handy

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

• Performing a fuzzy search may retrieve terms with similar spellings: wenn das han heat gain ((yan liang) or (ying jin)) shang kai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wenn das han heat gain ((yan liang) OR (ying jin)) shang kai ;.
• Adding a wildcard symbol may retrieve word variants: wenn das han heat gain ((yan liang) or (ying jin)) shang kai ;*.