Some would say it is hard to answer based on the few information you provided.
However, the answer may be general enough to cover many more problems similar to your case.
First I would install this plugin.
Check the screenshots section for more info:
https://wordpress.org/plugins/show-current-template/screenshots/
It will provide you the list of files in use. This may be handy when you search where to edit your theme.
Editing themes directly is not recommended, but if you don’t care and just need to make it work than it is OK.
Normally you would create the child theme, or work on your translation for the theme.
You can use this kind of hooking to replace some string with another string for the whole theme if you add this to the functions.php file
function _20170116_replace_text ( $text ) {
// possible add the condition when ...
if ($text == 'View All'){$text="See All";}
return $text;
}
add_filter( 'gettext', '_20170116_replace_text' );
Check this and let me know if this works. With the show-current-template you can thinker the condition when to replace this text.
The condition you need to add to 20170116_replace_text may look like this:
if (in_array( $GLOBALS['pagenow'], array( 'your-page.php' ) )) {
}