Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
tranh vat » trinh vat, tranh va, tranh van
dung cong » dung trong
cong dang » cong dong, cong dan, cong dung
dang tran » dang thanh, quang tran, hoang tran
vat dung » van dung, va dung, viet dung
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((nhiet dong) or (hieu quang)) - canh tranh vat dung cong dang tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhiet dong) OR (hieu quang)) - canh tranh vat dung cong dang tran cao.
• Adding a wildcard symbol may retrieve word variants: ho ((nhiet dong) or (hieu quang)) - canh tranh vat dung cong dang tran cao*.