Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
bo thanh » o thanh, co thanh, vo thanh
ho thanh » hoc thanh, cho thanh, hoa thanh
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (chieu sach)) - hanh trinh cua nhung ((bo thanh) OR (ho thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chieu sach)) - hanh trinh cua nhung ((bo thanh) OR (ho thanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (chieu sach)) - hanh trinh cua nhung ((bo thanh) OR (ho thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu sach)) - hanh trinh cua nhung ((bo thanh) OR (ho thanh)) toan tap*.