Narrow and Broaden a Search. When searching for literature materials from the internet, two techniques can effectively be used to narrow or broaden a search. These techniques include topic identification and keyword identification. When the topic identification technique is used, the researcher identifies the topic to be searched and therefore searches the topic as a whole. This technique is also referred to as the exact phrase searching. Narrow and Broaden a Search.
Correa, D. & Owens, W. (2009). The Handbook to Literary Research. New York: Sage