Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
cong ngang » cong nhan, cong quang, cong nong
cua trung » cua truong, xuan trung, cua nhung
cong lang » cong vang, cong luong, cong quang
ho chieu » theo chieu, hoc thieu, doi chieu
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - ((hanh tranh) or (hanh trinh)) cua trung ((cong ngang) OR (cong lang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh tranh) OR (hanh trinh)) cua trung ((cong ngang) OR (cong lang)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh tranh) or (hanh trinh)) cua trung ((cong ngang) OR (cong lang)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh tranh) or (hanh trinh)) cua trung ((cong ngang) OR (cong lang)) toan cao*.