Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
thuong con » thuong dong, truong cong, thong cong
tung cao » nung cao, truong cao, trung cap
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 (chieu sach)) - thanh tung cao ((thuong cong) OR (thuong con)) dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - thanh tung cao ((thuong cong) OR (thuong con)) dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - thanh tung cao ((thuong cong) OR (thuong con)) dan chan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - thanh tung cao ((thuong cong) OR (thuong con)) dan chan cau*.