Perhaps you should try some spelling variations:
luan nhung » luan chung, luan hung, quan nhung
thien danh » thien anh, thien dang, thien thanh
nhung cong » dung cong, thong cong, hang cong
hanh dung » thanh dung, anh dung, hanh dong
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: hoc ((thien danh) or (dieu hanh)) - hanh dung luan nhung cong ((dan toan) OR (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (dieu hanh)) - hanh dung luan nhung cong ((dan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (dieu hanh)) - hanh dung luan nhung cong ((dan toan) OR (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (dieu hanh)) - hanh dung luan nhung cong ((dan toan) OR (dan than)) cau*.