Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thieu sach » chieu sach, thien hach, theo sach
hieu cach » hieu cac, chieu sach, hieu ca
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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

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