Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
sinh sach » chinh sach, sinh san, sang sach
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
tan ban » tang ban, can ban, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh sach - hanh tranh cua tong cong san ((((tan ban) or (van ban))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - hanh tranh cua tong cong san ((((tan ban) OR (van ban))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc sinh sach - hanh tranh cua tong cong san ((((tan ban) or (van ban))) or (toan ban))*.