Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
cong tac » cong ty
phan cau » phan dau, phan cac, phan tu
khan cap » khan ap, than cap, khoan cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sang - thanh trung cua khong ((cong san) or (cong tac)) ((phan cau) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - thanh trung cua khong ((cong san) OR (cong tac)) ((phan cau) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - thanh trung cua khong ((cong san) or (cong tac)) ((phan cau) or (khan cap))*.