Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luoc » trinh quoc, trinh duoc, trinh luat
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban

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

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