Perhaps you should try some spelling variations:
tuan heat » tuan hua, tube heat
heat gain » health gain, health gains, wheat grains
dang hadi » dang hai
yan tuan » yan guan, yan yuan, anh tuan
yang lin » yang jin, yang li, yang liang
wang lin » wang li, wang qin, wang limin
ying jin » yang jin, jing ji, yang jie
yang yi » yang di, yang xi, 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: wang yan tuan heat gain ((((yang lin) OR (wang lin))) or (((ying jin) or (yang yi)))) dang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan tuan heat gain ((((yang lin) OR (wang lin))) OR (((ying jin) OR (yang yi)))) dang hadi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan tuan heat gain ((((yang lin) OR (wang lin))) or (((ying jin) or (yang yi)))) dang hadi ;".
• Adding a wildcard symbol may retrieve word variants: wang yan tuan heat gain ((((yang lin) OR (wang lin))) or (((ying jin) or (yang yi)))) dang hadi ;*.