Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, hanh trinh, minh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
cua nhung » va nhung
cong van » cong vang, cong san, song van
tuan tap » toan tap, tuyen tap, toan tai
tuan tai » toan tai, quan tai, tan tai

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 trang) or (canh tranh)) cua nhung cong van ((tuan tap) OR (tuan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trang) OR (canh tranh)) cua nhung cong van ((tuan tap) OR (tuan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((hanh trang) or (canh tranh)) cua nhung cong van ((tuan tap) OR (tuan tai))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((hanh trang) or (canh tranh)) cua nhung cong van ((tuan tap) OR (tuan tai))*.