Perhaps you should try some spelling variations:
doc hieu » hoc thieu, hoc hien
ung cong » dung cong, luong cong, duong cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban
cong da » cong dan, cong dac, cong dau
da ung » dap ung, da dung, dan ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) tinh - thanh cong da ung cong tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - thanh cong da ung cong tan toan tap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - thanh cong da ung cong tan toan tap*.