How to Search Tweets from a Specific User
If you want to search tweets from a specific user, first log onto Twitter with your username and password. Once you're logged in, go to Twitter Advanced search. When you're in the Advanced search menu, type in the username you're looking for in the “From these accounts” box and click search. Alternatively, you can find a specific user's tweets by using the search code “From:Username” in the search bar. For example, if you wanted to see wikiHow's tweets, you would type “From:wikiHow.”
Log into Twitter. Navigate to www.twitter.com in your desktop browser with your username or email and password. Move to the Advanced search option. To access this option, search for something in the Twitter search box, then click on the ⋯ option and select Advanced search from the menu. Advanced search window will pop-up on your screen. Use twitter.com/search-advanced Advanced search to quickly access this option. Type a username. Scroll down to the “Accounts” title, then type any username (e.g. wikihow ) in the “From these accounts” box. If you want to customize your search results, use the other options from the Advanced search menu. Click on the Search button. You can see the blue “Search” button on the top-right side of the box. Now you can see the tweets from your favourite user. Click on the “Latest” header to see the recent Tweets from the account. That's it! Log into your Twitter account. Launch the Twitter app or visit www.twitter.com in your browser. Sign in to your account, if you haven't done so. Navigate to the search box. Type From:Username (e.g. From:wikiHow ) on the Twitter search bar and search. Then hit the search icon. You're done! If you want to search a specific word from a particular user, just add the word in front of From:Username. (E.g. From:wikiHow Life ). 
Log into Twitter. Move to the Advanced search option. Type a username. Click on the Search button. Now you can see the tweets from your favourite user. Log into your Twitter account. Navigate to the search box. You're done! 