Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
khong cong » thong cong, khong cang, chong cong
doi chieu » doc hieu, doi chi, ho chieu
tam khong » ta khong, tao khong, tam thuong
cong tan » cong tac, cong san, cong thanh
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 tam khong cong tan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung tam khong cong tan ((toan tap) OR (toan ban))*.