exact field match

[Antonio Zippo]

Hi all,

i'm using a string field named "myField"
and 2 documents containing:
1. myField="my name is james bond"
2. myField="james bond"

if i use a query like this: 
myField:"james bond" it returns 2 documents....

how can i get only the second document using a string or text field? I need to 
search the document with the exact value....nor documents containing the exact 
phrase in value

thanks in advance