Perhaps you should try some spelling variations:
hanh trinh » canh tranh
vap nhung » va nhung, ve nhung, voi nhung
hoc dien » hoc hien, hoc vien, hoc dieu
dien anh » tieng anh, dien dan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
chan cau » phan cau, can cau, chinh 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 dien anh - ((hanh trinh) OR (hanh chinh)) vap nhung ((cong dan) or (cong tan)) chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dien anh - ((hanh trinh) OR (hanh chinh)) vap nhung ((cong dan) OR (cong tan)) chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dien anh - ((hanh trinh) OR (hanh chinh)) vap nhung ((cong dan) or (cong tan)) chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc dien anh - ((hanh trinh) OR (hanh chinh)) vap nhung ((cong dan) or (cong tan)) chan cau*.