I live in Thailand and hold a B1/B2 visa to the US. If I wish to visit Canada or some other place can i enter Canada or other place with my B1.B2 US visa?
Your U.S. visa will not let you visit Canada or any European countries. The only countries I know besides the U.S. that it will allow you to visit are Mexico and Costa Rica. (Possibly some Caribbean countries too, not sure.)