can i use asset that i have buyed in marketplace for use commercial games?
If your game is distributed under the Unreal Engine license, then yes, all content is commercially usable for derived works.
If your game is not distributed under the Unreal Engine license, then it matters who produced the assets, as third-party assets are still OK, but the assets from EPIC are not allowed for non-Unreal games.
EXACTLY what all these words mean for you, in your game, in whatever country/state/city you live, can only be interpreted by a licensed legal professional for that jurisdiction, so if you have more detailed questions, you’ll probably want to look at the marketplace license in detail and take it to “your lawyer” for discussion.