Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan bang » luan nang, luan ban, luan tang
bang cong » dang cong, bang song, hang cong
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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

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