Search Designer can search for documents, folders, or custom objects. You can also search for different objects at the same time. Help usually refers to "documents," but in most cases you can substitute the term "folders" or "custom objects" if you are designing a search for those object types.
Use the Object Types tab if you want to search for anything other than documents or you want to find only certain types of documents. Note that there are many types of documents, so you can choose a particular subclass within the Document category. You can choose only one primary object type (document, folder or custom object) or multiple object types per search.
To specify an object type or multiple object types
Custom Object is disabled by default and you might not see it as an Object Type option. If you want to see this option, you need to modify the General Settings in Site Preferences.
NOTE If you select more than one object type, the related subclasses from each object type appear in a list format. Notice the Document, Folder and Custom Object icons next to the object subclass.
NOTE After you modify the main object type selections and you want to select the subclasses to limit your search, you must click Update Subclass List first to update the subclass list that appears in the grid below.
NOTE Users should understand that if they deselect all subclasses, they have told the system not to filter out anything. Therefore, the search results will include all subclasses in the object type. If you leave one subclass hidden, this won't happen. For example, you might keep the Document subclass hidden but expose all other Document subclasses (like search, entry, and publish templates). Users could deselect all of the subclasses they see and the search would filter out everything but the hidden document subclass.
OR
.A search is a type of document. By default, all document types are included in the search results. Your search always contains all text you entered in the Words/phrases field, so the search is always found along with other document types that contain the same text.