Perhaps you should try some spelling variations:
tranh tuong » tranh trong, tran tuong, thanh thuong
nhieu tang » nhiet nang
chieu sang » chieu sach, chieu xanh
duong cong » dung cong, luong cong, duong trong
hieu lang » hieu quang, hieu van, biet lang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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) or (hieu lang))) or (chieu sang)) - canh tranh tuong duong cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((nhieu tang) OR (hieu lang))) OR (chieu sang)) - canh tranh tuong duong cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((nhieu tang) or (hieu lang))) or (chieu sang)) - canh tranh tuong duong cong tan toan cau*.