Search With BuildFilter

Hi,

I am trying to search two fields using the BuildFilter extension method but no results are returned.  Here is the code I am using

var placeFilter = client.BuildFilter<Place>();
placeFilter = placeFilter.And(p => p.Name.MatchCaseInsensitive("Name"));
placeFilter = placeFilter.And(p => p.Locality.MatchCaseInsensitive("Locality"));
var place = _findClient.Search<Place>()
    .Filter(placeFilter)
    .GetResult();

Running a search using either one of Name or Locality returns results, when used in an AND query nothing is returned.

Any help would be appreciated.

Thanks