Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, hang cong
cong dung » cuong dung, cong dong, cong luong
dung tran » dung trang, dung tren, hung tran
tranh va » tranh van, trang va, trinh va
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 va nhung cong dung tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhiet dong) OR (hieu quang)) - canh tranh va nhung cong dung tran cao.
• Adding a wildcard symbol may retrieve word variants: ho ((nhiet dong) or (hieu quang)) - canh tranh va nhung cong dung tran cao*.