Perhaps you should try some spelling variations:
wang oanh » wang yan, wang yang, dang anh
oanh tran » anh tran, anh tuan, binh tran
tran heat » urban heat, tran dat, trans health
heat gain » health gain, health gains, wheat grains
dang hadi » dang hai
yang lin » wang lin, yang liang, huang lin
yang jin » yang jun, ying jin, shang jin
yang jie » yang di, yang jui, yang xi
yang li » yang di, yang xi, yang yi

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

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