Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
tan thanh » tran thanh, tang thanh, toan thanh
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, tra cau
hoc tan » hoc tang, hoc dan, hoc tap
ran cau » van cau, ban cau, can cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tan thanh - ((hanh trinh) or (canh tranh)) cua nhung cong tan ((tran cau) OR (ran cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tan thanh - ((hanh trinh) OR (canh tranh)) cua nhung cong tan ((tran cau) OR (ran cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tan thanh - ((hanh trinh) or (canh tranh)) cua nhung cong tan ((tran cau) OR (ran cau))".
• Adding a wildcard symbol may retrieve word variants: hoc tan thanh - ((hanh trinh) or (canh tranh)) cua nhung cong tan ((tran cau) OR (ran cau))*.