I’ve been particularly dense about figuring this out, so, having stumbled upon it, I thought I’d share it with anyone who hasn’t gotten the most out of Evernote—particularly its tagging features. I’m surprised that Evernote doesn’t make more of this. It seems to be buried deep in their documentation, but to me, if I can remember all the parameters, it suddenly makes Evernote a much more powerful beast.

As Mark Stout points out, you can then save a complex search in Evernote and that becomes a filter of its own.

The easiest way to find something is just to type a keyword for it in the search box.

Indonesia

If you want to exclude a word from the results, prefix it with the minus sign:

-indonesia

If you’re looking for any of several words—in other words soeharto OR suharto—you can use the modifier any.
Note there has to be a space between the any: and the first search term. Any: must be after other parameters but before the search terms. All words after any: will be assumed to be part of the any: search:

any: soeharto suharto

Tags

You can also narrow down by tags (note there’s no space between colon and the tag word):

tag:indonesia

If you add tags together, you need to preface each with tag:

tag:interview tag:thailand

If a tag is more than one word, then you need to put it in quotes:

tag:"digital abundance"

If you want to exclude all notes with a certain tag you can:

-tag:china

You can also use wildcards with (or to exclude) tags (wildcards can only appear at the end of words, or alone):

tag:com*

Notebooks

You can specify which notebook or notebooks you want to search in (so you don’t have to click on a specific notebook before you search):

notebook:unifi

The notebook parameter must precede all other parameters. 
If your notebook contains more than one word the words need to be within quotation marks: notebook:”media asia”
It doesn’t seem to be possible to use this modifier to search all notebooks (unless you add them all manually by name.)

Titles

You can limit your search to notes with a word in the title:

intitle:indonesia*

Date

You can limit your search by date. Use the terms:

• created – when the note was created
• updated – when the note was updated

on or after a specific date: created:20091113
on or after a specific time (in this case 9.15 am): created:20091113T091500
or today: created:day
or yesterday: created:-day
or the past 30 days: created:day-30
or this week: created:week
or this month: created:month
or this year: created:year

The minus sign makes all these before this date or period:

Or before a date: created:-20091113
or yesterday: created:day-1
etc

Resource

You can also find notes with or without images, audio or ink notes

notes with at least one image or gif: resource:image/gif
notes with no audio: -resource:audio/*

Sources

(but my mistakes)

Evernote API Overview

The ever-extensible Evernote

Evernote: Using Extended Search Syntax