Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
hieu manh » hieu nganh, dieu hanh, hien hanh
cong vang » cong quang, cong ngang, cong san
cong lang » cong luong, cong quang, cong ngang
tung cua » trung cua, tuong cua, dung cua
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (chieu xanh)) - thanh tung cua cong ((cong vang) or (cong lang)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - thanh tung cua cong ((cong vang) OR (cong lang)) toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (chieu xanh)) - thanh tung cua cong ((cong vang) or (cong lang)) toan ban*".