Perhaps you should try some spelling variations:
khuong tinh » chuong trinh, phuong trinh, phuong binh
phuong tinh » phuong trinh, phuong binh, phuong linh
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trang dan » trang doan, trong dan, trang van
tang dan » tang van, tung dan, tang luan
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 chieu xanh - hanh ((trang dan) or (tang dan)) thi ((phuong tinh) OR (khuong tinh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trang dan) OR (tang dan)) thi ((phuong tinh) OR (khuong tinh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((trang dan) or (tang dan)) thi ((phuong tinh) OR (khuong tinh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((trang dan) or (tang dan)) thi ((phuong tinh) OR (khuong tinh)) toan ban*.