Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu hanh » thien thanh, thien chanh, thi hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
van cong » van dong, van phong, phan cong
van toan » van tuan, van tan, van thanh
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: hoc ((thieu hanh) OR (thieu khang)) - hanh tang luan van cong ((van toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu hanh) OR (thieu khang)) - hanh tang luan van cong ((van toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu hanh) OR (thieu khang)) - hanh tang luan van cong ((van toan) or (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu hanh) OR (thieu khang)) - hanh tang luan van cong ((van toan) or (dan than)) cau*.