Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » hanh trinh, hanh trang, lanh tranh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
ho chieu » theo chieu, hoc thieu, doi chieu
chat tai » chat thai, cao tai, khau tai

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 tranh) OR (canh tranh)) va ((nhung cong) or (thong cong)) cao chat tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh tranh) OR (canh tranh)) va ((nhung cong) OR (thong cong)) cao chat tai*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh tranh) OR (canh tranh)) va ((nhung cong) or (thong cong)) cao chat tai*".