Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
hieu manh » hieu nganh, dieu hanh, hien hanh
tung tuan » trung tuan, hung tuan, quang tuan
tuan hang » tuan hoang, tuan bang, tuan dang
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap

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)) - thanh tung tuan hang ((nong dan) OR (cong dan)) toan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - thanh tung tuan hang ((nong dan) or (cong dan)) toan cau*.