Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
dung cong » dung trong
dien dan » vien dai, gian dan, dien va
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
van chat » cao chat
va dung » van dung, va duong, vat dung
van hau » van ha, van hai, van dau
hien » bien, vien, hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dien dan) or (hien dai)) - hanh trinh va dung cong tan ((van chat) or (van hau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien dan) OR (hien dai)) - hanh trinh va dung cong tan ((van chat) OR (van hau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((dien dan) or (hien dai)) - hanh trinh va dung cong tan ((van chat) or (van hau))*.