Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, nhung don
thanh hai » thanh phan, thanh hoa, thanh san
thanh van » thanh san, thanh toan, thanh phan
hang cong » dang cong, hang nong, bang cong
tac toan » tap toan, tam toan, hach toan
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: theo chieu xanh - ((thanh hai) or (thanh van)) cua ((nhung cong) OR (hang cong)) tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((thanh hai) OR (thanh van)) cua ((nhung cong) OR (hang cong)) tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((thanh hai) or (thanh van)) cua ((nhung cong) OR (hang cong)) tac toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((thanh hai) or (thanh van)) cua ((nhung cong) OR (hang cong)) tac toan cao*.