Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
tranh va » tranh van, trang va, trinh va
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((hoc thieu) or (toc thieu))) or (ho chieu)) xanh - canh tranh va nhung cong tac phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc thieu) OR (toc thieu))) OR (ho chieu)) xanh - canh tranh va nhung cong tac phan dau.
• Adding a wildcard symbol may retrieve word variants: ((((hoc thieu) or (toc thieu))) or (ho chieu)) xanh - canh tranh va nhung cong tac phan dau*.