I am using mongodb 2.4.8.

> db.thread_data.runCommand("text", {search : "all"});

{
"queryDebugString" : "||||||",
"language" : "english",
"results" : [ ],
"stats" :

{ "nscanned" : 0, "nscannedObjects" : 0, "n" : 0, "nfound" : 0, "timeMicros" : 64 }

,
"ok" : 1
}

-> thread_data is a collection, which is text indexed.
-> {search : "all"} here we are searching all the documents of thread_data where "all" word is present
-> In thread_data collection "all" word is present in the document but it is not present in the results.
-> From the documentation the search word will be in the "queryDebugString" of the output. but it is not happening.