I finally got the error, i look on other threads and found out that some times convertd is not enabled by deafault on upgrades, that's why i haven't got the whole result, here is how i fix it:
First check if it's installed and enabled:
su - zimbra
zmprov gs `zmhostname` | grep zimbraServiceInstalled
zmprov gs `zmhostname` | grep zimbraServiceEnabled
then enable it
su - zimbra
zmprov ms `zmhostname` -- +zimbraServiceEnabled convertd
zmconvertctl start
then index the mailboxes and got my searches back
