Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » dong thanh, cong trinh, truong thanh
hang hoach » thanh hoach, hang hoa, hang doanh
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong tan » cong tac, cong san, cong ty

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 (trung cap)) nhung ((cong tan) OR (cong thanh)) hang hoach~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung cua) OR (trung cap)) nhung ((cong tan) OR (cong thanh)) hang hoach.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh ((trung cua) or (trung cap)) nhung ((cong tan) OR (cong thanh)) hang hoach".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung cua) or (trung cap)) nhung ((cong tan) OR (cong thanh)) hang hoach*.