Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung phat » truong phat, trong phat, trung phan
hieu lang » chieu sang, hieu quang, nhieu tang
phat hanh » phat thanh, nhat hanh, pham hanh
hanh cong » thanh cong, hang cong, hanh dong
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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 hieu lang - thanh trung phat hanh cong dan ((toan cau) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung phat hanh cong dan ((toan cau) or (toan cao))*.