Perhaps you should try some spelling variations:
tuong cong » truong cong, trong cong, tong cong
hanh trang » thanh trung, canh tranh, hanh trinh
hieu quan » lieu quan, thien quan, lien quan
trang van » tran van, trang va, trong van
van tuong » van truong, van thuong, van duong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu qua) or (hieu quan)) - hanh trang van tuong cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu qua) OR (hieu quan)) - hanh trang van tuong cong dan than ban*.