Conditional Display of Blog Posts (AND vs OR)

Lets say I have categories A & B

Then I have categories 1 & 2

And then I have three blog posts with the following categories applied to them:

Post 1= Category B

Post 2 = Categories B & 2

Post 3 = Category 2

I know I can use Enfold to display blog posts from multiple categories…say, I could use the Blog Posts widget in the layout editor to tell a page to display everything that has utilized categories B and/or 3 and therefore all three of these posts would populate.

But let’s say I only wanted to populate posts that have utilized categories B AND 3…therefore only displaying Post 2, since Post 1 and 3 only utilize one of the conditions but not both…

Is this possible?

Furthermore, is there a way to display ONLY posts that have certain categories and tags?

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I’m building a travel blog with a more complex organization method than just travel-related blog entrees. Essentially, I have a “Stories” category and a “Informational” category. And each post will either be a story or informational post, and they will also all need to have a location category or tag, such as North America, South America, etc.

However, let’s say I want to display STORIES from NORTH AMERICA on one page and then display INFORMATIONAL POSTS from NORTH AMERICA on another page. Currently, using the Blog Posts widget, if I were to choose STORIES and NORTH AMERICA from custom taxonomy, it shows ALL stories (from all locations) and all informational posts from north america….I need to know how to isolate posts that meed all the criteria I specify.