You can search for tweets from any specific user or find particular keywords from an account on Twitter.
Steps
Use Twitter Advanced Search

Go to Twitter. Log in with your username/email and password.


Enter the username. Type any username (e.g., Mytour) in the From these accounts field.

Scroll down and click on the Search button.

That's it. You can now view tweets from your favorite user.
Use a search code

Go to Twitter. Log in to your account.

Enter From:Username (e.g., From:Mytour) in the Twitter search bar and search.

That's it. If you want to search for specific keywords from a user, simply add the keyword before the From:Username code. (For example: From:Mytour Life).