Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh, hanh chinh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua phong » cua phuong, cua khong, cuu phong
cong dan » cong san, huong dan, cong tac
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 thiet tach - hanh trinh cua phong ((((cong dan) OR (cong dong))) or (cong tan)) than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh trinh cua phong ((((cong dan) OR (cong dong))) OR (cong tan)) than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - hanh trinh cua phong ((((cong dan) OR (cong dong))) or (cong tan)) than man".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - hanh trinh cua phong ((((cong dan) OR (cong dong))) or (cong tan)) than man*.