Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » dong thanh, cong trinh, cong tan
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
cua tong » cua cong, cua dong, cua nong
cong tac » cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - thanh trung cua tong ((cong tac) or (cong thanh)) ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung cua tong ((cong tac) OR (cong thanh)) ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung cua tong ((cong tac) or (cong thanh)) ((toan tap) or (toan ban))*.