Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
dang manh » dang hanh, duong manh, dang thanh
dang minh » dang dinh, dang sinh, dang tinh
cua dung » cua dang, cua dong, qua dung
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 chieu sach - ((hanh tranh) or (hanh trinh)) cua dung ((dang manh) OR (dang minh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh tranh) OR (hanh trinh)) cua dung ((dang manh) OR (dang minh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh tranh) or (hanh trinh)) cua dung ((dang manh) OR (dang minh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh tranh) or (hanh trinh)) cua dung ((dang manh) OR (dang minh)) toan tap*.