Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh trang » thanh trung, canh tranh, hanh trinh
hoc nhieu » hoc thieu, hoc nhiet, hop nhieu
trang cua » tranh cua, tang cua, trung cua
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tac toan » tap toan, tam toan, hach toan
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: hoc nhieu tang - hanh trang cua ((hang cong) or (dang cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhieu tang - hanh trang cua ((hang cong) OR (dang cong)) tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc nhieu tang - hanh trang cua ((hang cong) or (dang cong)) tac toan cau*.