Perhaps you should try some spelling variations:
chieu hanh » chieu xanh, dieu hanh, chi hanh
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan ban » luan van, luan san, luan han
ban cong » bang cong, van cong, phan cong
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu hanh) OR (hien hanh)) - hanh tang luan ban cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu hanh) OR (hien hanh)) - hanh tang luan ban cong ((dan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu hanh) OR (hien hanh)) - hanh tang luan ban cong ((dan toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu hanh) OR (hien hanh)) - hanh tang luan ban cong ((dan toan) or (dan than)) cau*.