Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
thong cong » trong cong, tong cong, thong thong
hang hoach » thanh hoach, hang hoa, hang doanh
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong ban » cong bang, cong san, cong tan
ban hang » ngan 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 thong cong ban hang hoach~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (hieu lang)) - thanh trung cua thong cong ban hang hoach".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (hieu lang)) - thanh trung cua thong cong ban hang hoach*.