Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hang hoach » thanh hoach, hang hoa, hang doanh
hieu lang » hieu quang, nhieu tang, hieu van
cua thong » cua thuong, cua khong, cua tong
cong bang » cuong bang, dong bang, hong bang
bang hang » ban hang, hang hang, nang 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) OR (thanh tung)) cua thong cong bang hang hoach~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - ((thanh trung) OR (thanh tung)) cua thong cong bang hang hoach.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - ((thanh trung) OR (thanh tung)) cua thong cong bang hang hoach".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - ((thanh trung) OR (thanh tung)) cua thong cong bang hang hoach*.