facebook - GraphApi Search User -

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i'm doing tests graph api , search option , several doubts came mind.

1) when search:

search?type=user&q=lucas+olivel&fields=name,id,picture

why receive results "matheus olivela", "gabriel olivel pagliuca" people hasn't lucas in name?

2) i've friend on facebook named "daniel genezini", when search:

search?type=user&q=daniel+genezini&fields=name,id,picture

i didn't receive results; because privacy configuration? found "search person (if allow name searched for)." on https://developers.facebook.com/docs/graph-api/using-graph-api/v2.0 page, user config on facebook?

3) field search using search , user type based on name? no possibilities search other fields or more one? reference: https://developers.facebook.com/docs/graph-api/using-graph-api/v2.0

1.) facebook search graph api did not support exact match

2.) user can untick settings "let other search engines link timeline" @ https://www.facebook.com/settings?tab=privacy&section=search&view

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3.) documentation, q value name, i.e user's name

enter image description here

*search user email deprecated explained here, https://developers.facebook.com/x/bugs/453298034751100/

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