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
doan dieu » nhan dieu, dang dieu, toan dien
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
doan dau » phan dau, doan va, van dau

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