Without vpn - for Windows 7 or 8, try (it might or might not work) using latest Chrome or Firefox as your browser, download Hola Better Internet and install as your extension/add-ons, restart browser and try again. With Android tablet/TV Box or Linux, try using "Set DNS" (free app) - also, change your router/adapter settings with DNS, use "open dns" instead of google or ISP"s default ones to bypass geoblocking via your ip address.
From Mongolia, you might also have the great (fire)wall of China blocking or filtering - ok in accessing BBC, CNN and other popular US/UK sites?