Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
cua tong » cua nong, cua song, cua ong
cua dong » chua dong, cua dang, cua nong
cong van » cong vang, cong san, song van
van tai » von tai, van tuan
tai tap » bai tap, tai tao, hai tap

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 ((cua tong) or (((cua dong) or (cua cong)))) cong van tai tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh tranh ((cua tong) OR (((cua dong) OR (cua cong)))) cong van tai tap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh tranh ((cua tong) or (((cua dong) or (cua cong)))) cong van tai tap*.