Advanced search query builder on smart phone

Question

I'm developing a Windows Phone 8 app where all the pages are in portrait orientation. I have the problem of designing/porting this kind of a GUI to smart phones:

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The comboboxes on the left represent boolean operators, the comboboxes on the right represent various fields (person's name, surname, address...), the middle textboxes contain keywords.

So, I came up with this:

^{download bmml source}

Do you think this UI is understandable for the non-technical folk of the internets? Do you have any suggestions on improving the design?

Answer 1

You could try this layout.

The radios are to eliminate drop-down selection tasks on a mobile. At the same time default search attributes (Name, Surname, Address) should be selected as most probable ones to minimize selection tasks, too.

Also if you have no constraints on search field number you could provide all available attributes allowing some of them to be empty while submitting.

Answer 2

This kind of interface should be the advanced mode on computer. On phone typing and many button/combo click is painful.

Very few people like to customize very closely their search with and/or even on computer. If you can, replace it with only one search with no option.
Then on the result page offer filtering options, Name must be, Surname must be, address must include...

The Thunderbird Global search option maybe a good sample how one search with no option and filters can helps to find the result (https://support.mozillamessaging.com/en-US/kb/global-search)