Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh trinh » canh tranh, hanh chinh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
van dung » van dong, xay dung, tin dung
cong tac » cong ty
tac ran » tac can, tac van, tac quan
ran cau » van cau, ban cau, can cau

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) or (toc thieu)) tinh - ((hanh tang) or (hanh trinh)) van dung cong tac ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (toc thieu)) tinh - ((hanh tang) OR (hanh trinh)) van dung cong tac ran cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (toc thieu)) tinh - ((hanh tang) or (hanh trinh)) van dung cong tac ran cau*.