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
cua phong » cua phuong, cuu phong, chau phong
cua khong » hua khong, cua phuong, cua thuong
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) or (cua khong)) ((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) OR (cua khong)) ((cong dan) OR (cong tan)) than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh trinh ((cua phong) or (cua khong)) ((cong dan) OR (cong tan)) than man".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh trinh ((cua phong) or (cua khong)) ((cong dan) OR (cong tan)) than man*.