Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
dua nhung » cua nhung, du nhung, qua nhung
doc hieu » toc thieu, hoc thieu
anh nang » ganh nang, anh bang, anh dang
nang dua » nang du, nang suat, nang quan
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) manh - anh nang dua nhung cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) manh - anh nang dua nhung cong san phan cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) manh - anh nang dua nhung cong san phan cau*.