News for Chrome Android are coming, starting with this announced today(5) on the app development blog.
Soon you will be able to search quickly with terms of any web page. When browsing, simply select the word you want to search and tap the tab that will appear below the browser, as shown in the example below.

Sliding down you will get more results for the term and by doing the opposite you will close the function. All this without having to copy the word and open a new tab for the search.
The novelty will be available in the next days on Chrome for Android. Support for Asian languages should arrive in the coming weeks. Nothing has been said if the function will reach iOS as well.
↪ Source: Google Chrome Blog