[L640] Sync problem with gmail contacts?

[Windows Central Question]

i have all my contacts very well organized on my gmail account.

I recently bought a lumia 640, and i added my gmail accounts, sync'ing emails, contacts ans calendars.
The contacts were sync'ed but not totally... Most of the contacts have the phone numbers but not the email adresses or other info...
And i cant understand why.
Can anyone help please?

Thank you!