Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh qua » tranh cua, thanh qua, trinh qua
hoc dien » hoc vien, hoc dieu, hoc lien
qua dung » quang dung, su dung, qua song
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap

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) or (hoc hien)) anh - hanh tranh qua dung ((cong dan) OR (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dien) OR (hoc hien)) anh - hanh tranh qua dung ((cong dan) OR (cong tan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc dien) or (hoc hien)) anh - hanh tranh qua dung ((cong dan) OR (cong tan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc dien) or (hoc hien)) anh - hanh tranh qua dung ((cong dan) OR (cong tan)) toan cau*.