Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
tran tuan » tran xuan, tran quang, tran thanh
cong san » cong tac
san van » tan van, luan van, tran van

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) or (tran tuan)) nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung cua) OR (tran tuan)) nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung cua) or (tran tuan)) nhung cong san van ban*.