Hi resnic as far as i know gemini63 was granted a visit visa 3x and shes doing same process,fortunately u can get longer than 6 (visit visa)months for the 2nd time around....
just my IMO,yes u can do the same process and documents but she need to apply personally as there is biometric (fingerprinting and picture) now, unlike last year,meaning u cant apply online,but she can schedule her application through online
as for your friend w/ Vietnamese g/f, well i wonder how they process visa on their country but for sure as far as UK visa is concern i bet they have biometric system also in vietnam
wish u good luck and try it who knows there is no harm in trying
