Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tranh va » tranh van, trang va, trinh va
toan tai » doanh tai, toan cao, von tai
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: doi chieu sach - hanh tranh va nhung cong trinh ((((toan tap) or (toan tai))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh tranh va nhung cong trinh ((((toan tap) OR (toan tai))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh tranh va nhung cong trinh ((((toan tap) or (toan tai))) or (toan ban))*.