[Fianchetto]

That is not a semi-bluff, unless the dealer is going to put up 6th street for you.

A semi-bluff is when you still have ways to improve your hand with card(s) to come.

As for your river raise, I don't think you will ever fold out a better hand. Will you ever get called by a worse hand, i.e. two pair?....maybe. But mostly I think you lose to a straight or flush, so I don't see much point to raising.