Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
dung cong » dung trong
dien anh » tieng anh, dien dan
trinh ve » trinh he, trinh va, trinh vi
cong tan » cong tac, cong san, cong thanh
phan dau » phan tu, hang dau
ve dung » ve duong, ve rung, va dung
van cau » van dau, van hau, van chat
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 anh) or (hien dai)) - hanh trinh ve dung cong tan ((van cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien anh) OR (hien dai)) - hanh trinh ve dung cong tan ((van cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((dien anh) or (hien dai)) - hanh trinh ve dung cong tan ((van cau) or (phan dau))*.