Search against System "fields"

Bobby_White_(veneti01admin_-_(deleted))

I'm trying to perform a search against some of the "built-in" fields that are part of a node and I'm never able to see values for many of them in the result set. For example:Using LAPI_SEARCH.ApplyQuery()These select fields: Name, SubType, CreateDate, ModifyDate (OTSubType : ( 0 OR 144 OR 136 )) AND 'example'Results:Name and SubType have values, but CreateDate and ModifyDate are always null.Any suggestions as to why this doesn't work?Alternatively, where can I find a valid list of field names that are searchable and returnable by ApplyQuery?Thanks, Bobby