Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
dang hari » dang hai
yan guan » gan guan, yan yuan, yang guang
yang jin » yang jie, yang jun, ying jin
nan yan » nan ya, wang yan, qian yan
yang li » yang lin, yang di, yang yi
yang xi » yang di, yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: nan yan guan heat gain ((yang li) or (((yang jin) or (yang xi)))) dang hari ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan guan heat gain ((yang li) OR (((yang jin) OR (yang xi)))) dang hari ;.
• Adding a wildcard symbol may retrieve word variants: nan yan guan heat gain ((yang li) or (((yang jin) or (yang xi)))) dang hari ;*.