Perhaps you should try some spelling variations:
theo nhieu » theo chieu, theo tieu, he nhieu
nhieu tang » chieu sang, hieu lang, nhiet nang
dung cong » dung trong
cong tam » cong tan, cong nam, dong tam
cong tap » cuong tap, cong tan, tong tap
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo nhieu tang - thanh ((cong tam) OR (((cong tac) OR (cong ty)))) dung cong tap toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo nhieu tang - thanh ((cong tam) or (((cong tac) OR (cong ty)))) dung cong tap toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo nhieu tang - thanh ((cong tam) or (((cong tac) OR (cong ty)))) dung cong tap toan cau*.