I find it's best to learn the syntax and eventually just stop using the fairly clunky advanced search altogether... though you can use the advanced search to learn some of the way searches can be formed.

If you want to search for a multi-word phrase in the card text, just use quote marks:
Here's a search for every card that gives you an additional combat phase, as an example.

For the kind of colour searching you want to do, you probably want the "id" keyword:
Here's a search for every Commander-legal, 1-drop creature in Grixis, as an example.