Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
hoc hieu » hoc hien, doc hieu, hoc dieu
trinh ve » trinh he, trinh va, trinh vi
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
ve dung » ve duong, ve rung, va dung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) lang - hanh trinh ve dung cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) lang - hanh trinh ve dung cong dan than cau*.