Perhaps you should try some spelling variations:
nhiet nang » nhiet dong, viet nang, nhieu tang
chiet tach » chieu sach
tang thanh » dang thanh, trung thanh, hoang thanh
thanh tung » thanh cong
manh tang » manh thang, manh tung, anh tang
tung cong » dung cong, tong cong, truong cong
cong tap » cuong tap, cong tac, cong tan
toan cau » toan ban, toan tap, toan tai
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 (chiet tach)) - manh tang thanh tung cong tap ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhiet nang) OR (chiet tach)) - manh tang thanh tung cong tap ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((nhiet nang) or (chiet tach)) - manh tang thanh tung cong tap ((toan cau) or (toan cao))*.