Rather that typing a long sentence, enter something like 'document separator'. This will return all the articles with the words 'document' or the word 'separator' in the title or keyword list.
When creating a new Umango zone index you may experience the error: ...The type serialized in the resources file was not the same type that the .resources file said it contained. Expected 'System.Windows.Forms.ListViewItem' but read 'System.Windows.Forms.ListViewItem+ListViewSubItem' [open]