Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
hoc hieu » hoc thieu, doc hieu, hoc dieu
cang dan » cong dan, tang dan, dang dan
canh dan » canh van, sanh dan, thanh dan
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 hieu) or (hoc hien)) manh - hanh tranh cua khong ((cang dan) or (canh dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) manh - hanh tranh cua khong ((cang dan) OR (canh dan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) manh - hanh tranh cua khong ((cang dan) or (canh dan)) toan cau*.