Perhaps you should try some spelling variations:
peak heat » weak head
heat gain » health gain, health gains, wheat grains
zhang zhi » zhong zhi, wang zhi, zhang wei
yan peak » can speak, a peak
yang yin » yang jin, yang lin, yang yun
wan yan » wang yan, nan yan, wai yan
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: wan yan peak heat gain ((yang yin) or (yang yi)) zhang zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan peak heat gain ((yang yin) OR (yang yi)) zhang zhi ;.
• Adding a wildcard symbol may retrieve word variants: wan yan peak heat gain ((yang yin) or (yang yi)) zhang zhi ;*.