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 » thong cong, hang cong, nhung don
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
chat » nhat, phat
thai » tai, thi, hai

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) OR (dung cong)) cao chat thai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh tranh va ((nhung cong) OR (dung cong)) cao chat thai".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh tranh va ((nhung cong) OR (dung cong)) cao chat thai*.