Perhaps you should try some spelling variations:
thanh trang » thanh trung, hanh trang, thanh thang
hieu quang » thieu quang, hieu quan, hieu qua
tong cong » trong cong, cong cong, dung cong
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((nhiet dong) or (hieu quang)) - thanh trang va tong cong tan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((nhiet dong) OR (hieu quang)) - thanh trang va tong cong tan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((nhiet dong) or (hieu quang)) - thanh trang va tong cong tan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi ((nhiet dong) or (hieu quang)) - thanh trang va tong cong tan ((toan cao) OR (toan ban))*.