Perhaps you should try some spelling variations:
nhanh lang » nhanh thang, nhan dang, nhanh dong
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran van » luan van

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 (ho chieu)) xanh - ((nhanh lang) OR (nhanh quang)) cua dung cong tac tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (ho chieu)) xanh - ((nhanh lang) OR (nhanh quang)) cua dung cong tac tran van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (ho chieu)) xanh - ((nhanh lang) OR (nhanh quang)) cua dung cong tac tran van".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (ho chieu)) xanh - ((nhanh lang) OR (nhanh quang)) cua dung cong tac tran van*.