Managing Search Availability at the List and Site Level for Site Administrators
SharePoint Search has always been one of the most powerful features of the product, enabling users to find information to which they have permissions no matter which site it has been stored on. However, you might not always want them to be able to do this; at times you might want to ensure that some areas of your site collection are removed from the SharePoint index. In this lesson, we look at search settings for both your site and individual lists, and in particular at how to remove lists and even the entire site from search results. You also see how to exclude Web Part pages from appearing within the search results.
The procedure for excluding items from search results is essentially the same for libraries and lists: it is done from the Settings menu for each item. It can be a useful feature when you are using lists for things like lookup values (or the new relationships feature in SharePoint lists) and do not want to return such items using search. For example, you might have a list of ZIP codes or states that are used in several lists using a lookup column. Removing lists of value and data from search results can improve the experience of the user by making results more relevant.
You will find the Search setting in the General Settings category reached from then, Advanced Settings link in the settings for lists and document libraries. It is a simple radio button option with only a Yes ...