Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc trieu » hoc thieu, hoc tieu, hoc dieu
trinh tu » trinh ky, trinh do
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan cau » phan cau, can cau, chinh cau
tu dung » tuc dung, tu duong, su dung

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc trieu tinh - hanh trinh tu dung ((cong dan) OR (cong san)) chan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc trieu tinh - hanh trinh tu dung ((cong dan) OR (cong san)) chan cau*.