Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh tranh cua ((nhung don) OR (thong cong)) ((dan toan) OR (dan than)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh tranh cua ((nhung don) or (thong cong)) ((dan toan) or (dan than)) cau*.