Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hang hoach » thanh hoach, hang hoa, hang doanh
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong tan » cong tac, cong san, cong thanh
tan hang » tan khang, ban hang, van hang

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