Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tran » hanh trang, thanh tran, hanh tram
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
hoi hieu » hoi phieu, hoi tieu, moi hieu
tran van » luan van
van dung » van dong, xay dung, tin dung
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh tran van dung ((cong manh) or (cong danh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh tran van dung ((cong manh) OR (cong danh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh tran van dung ((cong manh) or (cong danh)) toan cau*.