Perhaps you should try some spelling variations:
quang trung » truong trung
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, truong thanh
cong quang » luong quang, thong quang, duong quang
tran tuan » tran xuan, tran quang, tran thanh
dung cong » dung trong
trung tan » trung tran, trung tang, truong tan
ho chieu » theo chieu, hoc thieu, mot chieu

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 sang - thanh ((trung tuan) or (tran tuan)) dung cong quang trung tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((trung tuan) OR (tran tuan)) dung cong quang trung tan.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((trung tuan) or (tran tuan)) dung cong quang trung tan*.