does facebook know what i am searching?

[Inda Cloud]

All of your activities are tracked on the internet. It starts with your ISP, which keeps a log of everywhere you go. Every single website you hit keeps a log of their users' activities (the server itself has a copy too, this is parsed out to every site on the server.) Every widget on every single site tracks you as well, whether it's for informational purposes or advertising purposes.

All social networks and search engines track you.