If condition in a filter function

Hi everyone!

I've got the following column:

FilteredColumn= 
COUNTROWS (
    FILTER (
        'Table1';
        'Table1'[Val1] = "0"
     && 'Table1'[Val2] = "Closed"
  && 'Table1'[Val3] < 16
    )
)

It's working fine, but now I've got an other filter that I don't know how to aply it.

I've go some new values, lets name them Val4, Val5 and Val6
What I need is to make the following condition:

If Val4 = 5 && Val5 = 2017, then I need to bring those values where Val6 is between 2 dates.

So, I will have 12 conditions in that if statement:

If Val4 = 1 && Val5 = 2017, then show me those values where Val6 is between Dec-16 and Jan 2017
If Val4 = 2 && Val5 = 2017, then show me those values where Val6 is between Jan-17 and Feb 2017
If Val4 = 3 && Val5 = 2017, then show me those values where Val6 is between Feb-17 and Mar 2017
and so on...

Is it possible to integrate that if statement, with the 12 conditions (one per month), in the "FilteredColumn" so I can get those values wich are:

Val1 = "0"
Val2 = "Closed"
Val3 < 16

If Val4 = 1 && Val5 = 2017, then show me those values where Val6 is between Dec-16 and Jan 2017

If Val4 = 2 && Val5 = 2017, then show me those values where Val6 is between Jan-17 and Feb 2017

If Val4 = 3 && Val5 = 2017, then show me those values where Val6 is between Feb-17 and Mar 2017

.. etc..

Hope you can undestand me, such as English is not my first language.

Kind regards!