Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
hoc thien » hoc hien, hoc thieu, hoc thiet
trinh cua » tinh cua, trinh luat, trinh quan
cua phong » cua phuong, cua khong, cuu phong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - hanh trinh cua phong ((cong dan) or (cong tan)) than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh trinh cua phong ((cong dan) OR (cong tan)) than man.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh trinh cua phong ((cong dan) or (cong tan)) than man*.