see: know something by eyes,
read: learn some literal things, by thinking the meaning of the words to get the point, you must be trying to get the point of what you read.
watch: keep an eye on something, which focus and patient are needed
find: emphasize the result.
search: emphasize the action you took
example:
1. I can see you are reading while watching TV, it is not working.
I see you, but no pay too much attention to you. maybe I've just take a glance on you. the thing is my eyes can catch you.
you can read books, papers or some articles, all of which are paint or written in words or photos, but not all them means something, and you should have your point on it.
you should watch for a period, not a glance. it takes some times to watch.
2. what did you find after the search?
you take an action of search, and find something out.