Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
hieu cach » hieu cac, chieu sach, hieu ca
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 hieu cach - ((hanh tranh) or (hanh trinh)) cua nhung ((cong dan) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((hanh tranh) OR (hanh trinh)) cua nhung ((cong dan) OR (cong tan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((hanh tranh) or (hanh trinh)) cua nhung ((cong dan) or (cong tan)) toan cao*.