Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » hanh trang, lanh tranh, nhanh thanh
hanh trinh » hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
tong hang » song hang, thong hoang, tiong chang
cua tong » cua cong, cua dong, cua nong
hang tai » hang va, dung tai
tai toan » bai toan, tap toan, tai tuan
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 sach - ((((hanh tranh) or (canh tranh))) or (hanh trinh)) cua tong hang tai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((((hanh tranh) OR (canh tranh))) OR (hanh trinh)) cua tong hang tai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((((hanh tranh) or (canh tranh))) or (hanh trinh)) cua tong hang tai toan ban*.