Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, tran tuan, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
cong danh » cuong danh, cong thanh, cong khanh
cong dan » cong san, cong tan, huong dan
tuan ban » tuan bang, toan ban, luan 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 - hanh ((trung tuan) or (trung tam)) nhung ((cong danh) OR (cong dan)) tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh ((trung tuan) OR (trung tam)) nhung ((cong danh) OR (cong dan)) tuan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh ((trung tuan) or (trung tam)) nhung ((cong danh) OR (cong dan)) tuan ban*".