Configuring Noise Words for Search
Noise words are words that are disregarded during a search and SharePoint includes some predefined noise words, such as it, is and a. To further refine search results I have added additional words to C:\Program Files\Microsoft Office Servers\14.0\Data\Office Server\Applications\GUID-query-0\config\noiseenu.txt using a new line for each word. After saving the text file I restarted the Search Service using the following commands:
net stop osearch14
net start osearch14