Perhaps you should try some spelling variations:
tran heat » urban heat, tran dat, trans health
heat gain » health gain, health gains, wheat grains
yan tran » oanh tran, anh tran, ca tran
ying jin » yang jin, jing ji, yang jie
yang jun » yang jui, pang jun, yang jin
yang yi » yang di, yang jui
yang xi » yang di, yang jui
wang » wing, wan, lang
haul » hall, paul, hail

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan tran heat gain ((((((yang yi) OR (yang xi))) OR (ying jin))) OR (yang jun)) long haul ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan tran heat gain ((((((yang yi) OR (yang xi))) or (ying jin))) or (yang jun)) long haul ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan tran heat gain ((((((yang yi) OR (yang xi))) or (ying jin))) or (yang jun)) long haul ;*.