Perhaps you should try some spelling variations:
thuyet mach » thuyet xac, thuyet cac, thuyet anh
thuat mach » thuat sach, thuat tach, thuat lanh
nhung nong » nhung cong, nhung bong, nhung chong
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
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 ((thuat mach) OR (thuyet mach)) - hanh chinh cua nhung nong ((dan than) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((thuat mach) OR (thuyet mach)) - hanh chinh cua nhung nong ((dan than) OR (tinh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((thuat mach) OR (thuyet mach)) - hanh chinh cua nhung nong ((dan than) or (tinh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((thuat mach) OR (thuyet mach)) - hanh chinh cua nhung nong ((dan than) or (tinh toan)) cau*.