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
nhung cong » thong cong, hang cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
gian bana » gian ban, gian dan, gian lang

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