Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
tuong va » truong va, thuong va, luong va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
tung va » trung va, dung va, vung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - thanh ((tung va) or (tuong va)) thong cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh ((tung va) OR (tuong va)) thong cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh ((tung va) or (tuong va)) thong cong dan toan tap*.