Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
tranh chap » tranh cua, trinh chat
tinh dinh » trinh dinh, tinh ninh, tinh binh
tap tranh » tap thanh, lap trinh, tap toan
va thong » va thuong, va phuong, he thong
cong tap » cuong tap, cong tac, cong tan
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 ((thieu xanh) OR (chieu xanh)) - tinh dinh va thong cong tap tranh chap~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - tinh dinh va thong cong tap tranh chap*.