How to make SharePoint 2013 search only in document content?

Question

We are using SharePoint 2013 environment and are facing following issue while doing search in the document library.
 There is  one document library named “MYDOC” .and it has two columns name ‘DocTitle’ and ‘DocTag’.. Although we are able to perform search on basis of document metadata and content, however we only want to search through the content of documents
in the library and not on the basis of document metadata (like ‘DocTitle’ or ‘DocTag’ columns). Is there a way to restrict search to document content only and not metadata?
Excluding the column name will not help since, if the searched keyword is exists in metadata as well then that item of library will not come in result. Is there any way of writing query in such a way that only document content will get queried?
-Aditya

Answer 1

Addition to the above,
Show or hide content from lists or libraries in search results
As a site owner, you can decide whether items in lists and libraries on your site are included in search results. By default every list and library is set to include all items in search results.
 Note    To change this setting, you must have the Manage Lists permission level. The Designer and “Site Name” Owner groups contain this permission level. When you do not have Manage Lists permissions, the menus
described in this procedure are not available.
Navigate to the site that contains the list or library that you want to change.
Locate and click the list or library you want to customize.
Click Site Actions, and then click Site Settings.
Under Site Administration, click Site Libraries and lists.
Click an item from the list, for example, Customize “Shared Documents.”
On the List Settings page, under General Settings, click
Advanced settings.
In the Search section, under Allow items from this document library to appear in search results, select
Yes to include all of the items in the list or library in search result or
No to exclude all items from search results.
http://office.microsoft.com/en-in/sharepoint-server-help/enable-content-to-be-searchable-HA010379092.aspx