Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dung cong » dung trong
hoc kinh » luoc kinh
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
toan ban » van ban
tan ban » tang ban, van ban, can ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc kinh) OR (hoc sinh)) sach - hanh tranh cua dung cong san ((tan ban) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc kinh) OR (hoc sinh)) sach - hanh tranh cua dung cong san ((tan ban) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc kinh) OR (hoc sinh)) sach - hanh tranh cua dung cong san ((tan ban) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ((hoc kinh) OR (hoc sinh)) sach - hanh tranh cua dung cong san ((tan ban) or (toan ban))*.