Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
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: ho ((dieu hanh) or (chieu sang)) - ((hanh tranh) or (hanh chinh)) cua dong cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((dieu hanh) OR (chieu sang)) - ((hanh tranh) OR (hanh chinh)) cua dong cong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((dieu hanh) or (chieu sang)) - ((hanh tranh) or (hanh chinh)) cua dong cong tac toan cao*.