Perhaps you should try some spelling variations:
"The experts sources in .NET" » "The expert sources in .NET", "The expertise sources in .NET", "The experts resources in .NET"
"The experts voices in .NET" » "The experts view in .NET", "The experts views in .NET", "The events voices in .NET"
"the expert's guide in .net" » "the expert guide in .net"
"the expert voices in .net" » "the expert sources in .net", "the expert view in .net", "the expert views in .net"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("The experts voices in .NET") OR ("The experts sources in .NET"))) OR ("the expert voices in .net"))) OR ("the expert's guide in .net")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"The experts voices in .NET\") OR (\"The experts sources in .NET\"))) or (\"the expert voices in .net\"))) or (\"the expert's guide in .net\"))".
• Removing quotes may allow a broader search: (((((( The experts voices in .NET ) OR ( The experts sources in .NET ))) or ( the expert voices in .net ))) or ( the expert's guide in .net )).
• Adding a wildcard symbol may retrieve word variants: (((((("The experts voices in .NET") OR ("The experts sources in .NET"))) or ("the expert voices in .net"))) or ("the expert's guide in .net"))*.