Nice effort khai1981! If you allow me to give some comments which just my 2 cents worth as stated below:-
1. Photography seems lack of angle shots & light sources hence, can't see the entire dio composition well.
2. Snow which covering your tanks were a bit overdone. In logic wise, such accumulation means the subjects been non mobile for a certain period. ( unless you are trying to portray vice versa ). Moreover, it does cover up all your hardwork of detailings and weathering elements.
3. Figure painting yet can be improve further more in terms of shadings. ( though painting 35s figures ain't easy...)
Just a noob comments from me but nevetheless you did show your effort in your dio! Keep it up! :D :D :D