Google AutoComplete API with modifiers in the middle of the keyword phrase ?

Hey,

I'm using the Google API : https://www.google.com/complete/search?output=toolbar&q={query} to find some longtail keywords.

The problem is if I want to get all keywords of type : "best * in cooking" where the * wildcard allows me to cycle through the alphabet (a, b, c, ...) I don't get the same results as I would directly in Google.

For example with this keyword :
best s in a cooking


In Google, I would get : best salt to use in cooking
In Google API, I would get : no result at all

Any idea on how to get these keywords using the API ?

Thx !