Perhaps you should try some spelling variations:
thanh hoach » thanh hoa, thanh hoang, thach hoanh
thanh trung » thanh tung
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
trung cua » truong cua, trung tuan, trung cap
ban thanh » ban hanh, ban 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 (chieu xanh)) - thanh trung cua ((dung cong) or (dung trong)) ban thanh hoach~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu xanh)) - thanh trung cua ((dung cong) OR (dung trong)) ban thanh hoach.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chieu xanh)) - thanh trung cua ((dung cong) or (dung trong)) ban thanh hoach".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chieu xanh)) - thanh trung cua ((dung cong) or (dung trong)) ban thanh hoach*.