Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
tranh chap » tranh cua, trinh chat
hieu manh » hieu nganh, dieu hanh, hien hanh
tinh dinh » trinh dinh, tinh ninh, tinh binh
tac tranh » tac thanh, tap tranh, sach tranh
va thong » va thuong, va phuong, he thong
cong tac » cong ty
dinh va » dinh van, dinh ve, tinh va

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: hoc ((hieu manh) OR (chieu xanh)) - tinh dinh va thong cong tac tranh chap~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - tinh dinh va thong cong tac tranh chap*.