Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thong cong » trong cong, tong cong, thong thong
van manh » van minh, van anh, van thanh
van hanh » van thanh, ban hanh, van anh
va thong » va thuong, va phuong, he thong
cong tac » cong ty
tac pha » tac pham, tac phat, tac ha
pha cau » phan cau, phap cau, pha cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - ((van manh) OR (van hanh)) va thong cong tac pha cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) OR (chieu sang)) - ((van manh) or (van hanh)) va thong cong tac pha cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) OR (chieu sang)) - ((van manh) or (van hanh)) va thong cong tac pha cau*.