Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung cua » truong cua, trung tuan, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
cua dan » cua dang, cua ban, ca dan

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 sang - thanh trung cua dan ((cong tan) OR (cong tac)) ((toan cau) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung cua dan ((cong tan) or (cong tac)) ((toan cau) or (toan cao))*.