Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
toc hieu » toc thieu, doc hieu, thuc hieu
cua dang » cua cong, cua ban
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: ((toc hieu) or (hoc thieu)) manh - ((thanh trung) OR (thanh tung)) cua dang cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc hieu) OR (hoc thieu)) manh - ((thanh trung) OR (thanh tung)) cua dang cong tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc hieu) or (hoc thieu)) manh - ((thanh trung) OR (thanh tung)) cua dang cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ((toc hieu) or (hoc thieu)) manh - ((thanh trung) OR (thanh tung)) cua dang cong tac toan tap*.