Perhaps you should try some spelling variations:
danh trung » dang trung, dinh trung, manh trung
thanh tung » thanh cong
duong cong » dung cong, luong cong, duong trong
doi chieu » doi chi, ho chieu, mot chieu
tam duong » tam huong, tuan duong, thao duong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) xanh - ((danh trung) or (thanh tung)) tam duong cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - ((danh trung) OR (thanh tung)) tam duong cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - ((danh trung) or (thanh tung)) tam duong cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - ((danh trung) or (thanh tung)) tam duong cong tac toan tap*.