Perhaps you should try some spelling variations:
thong thuong » thong thong, hang thuong, cong thuong
thanh trung » thanh tung
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thuong tac » tuong tac, huong tac, thuong thuc
tac quang » thac quang, tac quan, tai quang
trung he » trung ha, trong he, trung hieu

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 xanh) or (chieu sang)) - thanh trung he thong thuong tac quang nam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - thanh trung he thong thuong tac quang nam.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sang)) - thanh trung he thong thuong tac quang nam*.