Perhaps you should try some spelling variations:
heat gain » health gain, health gains, wheat grains
dang hadi » dang hai
yan tuan » yan yuan, anh tuan, can turn
yan guan » gan guan, yan yuan, yang guang
yang lin » wang lin, yang li, yang liang
yang jin » yang jun, ying jin, shang jin
yang jie » yang di, yang jui, yang xi

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan ((yan tuan) OR (yan guan)) heat gain ((yang lin) or (((yang jin) or (yang jie)))) dang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan ((yan tuan) OR (yan guan)) heat gain ((yang lin) OR (((yang jin) OR (yang jie)))) dang hadi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan tuan) OR (yan guan)) heat gain ((yang lin) or (((yang jin) or (yang jie)))) dang hadi ;".
• Adding a wildcard symbol may retrieve word variants: wan ((yan tuan) OR (yan guan)) heat gain ((yang lin) or (((yang jin) or (yang jie)))) dang hadi ;*.