Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trung tuan » trung thanh, trung tam, tran tuan
cong quang » luong quang, thong quang, duong quang
quang tran » quang tuan, quang trung, quang thanh
tran xuan » tran quang, tran van
dung cong » dung trong
tran tan » tran tuan, tran van, tran thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) OR (chieu sang)) - thanh ((trung tuan) or (tran xuan)) dung cong quang tran tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - thanh ((trung tuan) OR (tran xuan)) dung cong quang tran tan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chieu sang)) - thanh ((trung tuan) or (tran xuan)) dung cong quang tran tan".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chieu sang)) - thanh ((trung tuan) or (tran xuan)) dung cong quang tran tan*.