Perhaps you should try some spelling variations:
nhiet nang » nhiet dong, viet nang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu sang
tang thanh » dang thanh, trung thanh, hoang thanh
manh tang » manh thang, manh tung, anh tang
cong cong » cong dong, trong cong, dung cong
cong tap » cuong tap, cong tac, cong tan
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nhiet nang) or (chieu sach)) - manh tang thanh cong cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhiet nang) OR (chieu sach)) - manh tang thanh cong cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((nhiet nang) or (chieu sach)) - manh tang thanh cong cong tap toan cau*.