I use Google search engine almost everyday every hour. I think if you know how to operate Google search engine properly, it will save your time for wondering!

• '+' operator : it will find two or more words in author(s) including common words, letters or numbers e.g., [+I love you]
• '-' operatior: it will exclude the search term, as [love -author:Sunny]
• '*' operator : it operates with " ". Any word can replace with * e.g., "I * you" will find I hate you, I miss you...
• Phrase search:  it will get results the exact phrase as "I love you" 
• 'OR' operator: it will find articles containing either of two search terms love OR hate
• 'AND' operator: it will return results including both of two search terms love AND hate

For more information http://scholar.google.com.au/intl/en/scholar/refinesearch.html
Effective Google search tips http://www.googleguide.com/advanced_operators.html#inurl