Currently (as of March 2019) this is what worked for me:

from:@someone filter:nativeretweets [KEYWORD(s)]

This shows all retweets of @someone (including the optional KEYWORD(s)). If you retweeted the same tweet you can use @yourtwittername instead of @someone.

As @AlexVong noted in the comments, you can find the new referential retweets by using:

from:username include:nativeretweets filter:nativeretweets

Previously:

It seems like the syntax for showing all the retweets by a user is supposed to be:

from:username include:retweets filter:retweets

However, it seems all of this search syntax is broken in "modern" Twitter, where retweets are treated as a reference to the original tweet, rather than a separate "RT @originaluser stuff and things" tweet from the retweeter. filter:retweets picks up any tweet that happens to contain the word "RT" anywhere in the tweet but not actual retweets anymore.

Ok. I don't know if I'm misunderstanding the question, but what you need is very easy to do with TweetDeck.

1. Enter https://tweetdeck.twitter.com/
2. "Add Column" button
3. "Likes" option
4. You can select your own user or another one you want. Press "Add Column" button to confirm.
5. Once you have added the column there are options to filter tweets, such as search terms among others. Remember that this column is already filtering only the Liked Tweets:

Pop your handle into Social Bearing's Twitter Handle Search: Found Here. A dashboard should come up with all their tweets.

Click on the button which say's "Sort tweets by..." and Select "Favourites (high to low)"

You can similarly use this method to find any of the following

• Items by order of retweets
• Items by order of favorites
• Items by order of engagement
• Items by order of sentiment

This method works for any public twitter handle for up to 3200 tweets.

To see all tweets, from anyone, directed to a certain user, you can simply search for "@username". For example, try https://twitter.com/search?q=%40codinghorror to see all replies to Jeff Atwood.

I think I originally misunderstood the question, here's my original response:

Yeah, person A's Twitter replies to person B (tweets that begin with B's @username) are only visible in the Twitter stream of those followers of A who also follow B. I think this feature is fairly non-obvious, especially for new users.

To my knowledge, the easiest way to see also the "@ replies" (without following the other user) is to go to the user's profile (at the Twitter website: http://twitter.com/username, or through some Twitter client) and see their full tweet list there. However, then you'll of course see "@ replies" to everyone, not just to the individual you were interested in. To put it otherwise: no, there isn't an easier way. To see full "conversations" in your feed, you'll have to follow both (or all) parties taking part.