Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
thong cong » tong cong, thong thong, phong chong
dong thi » duong thi, dang thi, dong tai
tung va » trung va, tuong va, dung va
thi ha » thi hai, thi hanh

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 tung va ((thong cong) OR (trong cong)) dong thi ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - thanh tung va ((thong cong) OR (trong cong)) dong thi ha.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sach)) - thanh tung va ((thong cong) OR (trong cong)) dong thi ha".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sach)) - thanh tung va ((thong cong) OR (trong cong)) dong thi ha*.