If l studyed in Europe aviation as a commercial airlinepilot and l wanna be a pilot in United states or Canada is there any way to work for usa. airline. .l heard that europe pilots can not go work for usa airlines.

It is unlikely you would be hired as a domestic pilot as there is an excess of pilots. International routes would require seniority which would again preclude them hiring you. Unless you could get on with a courier l think your chances are limited. Why not apply for an EU Airline?