Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
doi chieu » doi chi, ho chieu, mot chieu
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua cong, cua ban
cong tac » cong ty
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: ((doi chieu) or (doc hieu)) tinh - ((hanh trang) or (hanh chinh)) cua dang cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) tinh - ((hanh trang) OR (hanh chinh)) cua dang cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doc hieu)) tinh - ((hanh trang) or (hanh chinh)) cua dang cong tac toan cao*.