Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong trong » khoang trong, thong trong, phong trong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cua khong » hua khong, cua phuong, cua thuong
trong van » trong cac
van than » van thanh, van thang, van tuan
than cao » toan cao, thai cao, 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: theo ((chieu xanh) OR (chieu sach)) - ((thanh trung) or (canh tranh)) cua khong trong van than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - ((thanh trung) OR (canh tranh)) cua khong trong van than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sach)) - ((thanh trung) or (canh tranh)) cua khong trong van than cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sach)) - ((thanh trung) or (canh tranh)) cua khong trong van than cao*.