Perhaps you should try some spelling variations:
thanh trung » thanh tung
dong thuong » cong thuong, dong thong, dong huong
dung thuong » dung trong, hang thuong, cong thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu quang » thieu quang, hieu quan, hieu qua
trung cao » truong cao, trung cap, trung co
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (hieu quang)) - thanh trung cao ((dong thuong) OR (dung thuong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (hieu quang)) - thanh trung cao ((dong thuong) OR (dung thuong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (hieu quang)) - thanh trung cao ((dong thuong) OR (dung thuong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (hieu quang)) - thanh trung cao ((dong thuong) OR (dung thuong)) dan than cau*.