Not tricky at all. To look for is a phrasal verb with the same meaning as 'to search' or 'attempt to find'. To find is used when the search is successful. E.g. He looked for his lost wallet, but did not find it (the search was unsuccessful) or 'he looked for it and found it under a cushion' (the search was successful)

When you look for something you might find it or not. 'To look for' means to search for it. For example, you are at home and ask your spouse: "I am LOOKING FOR my keys. Do you know where they are?" Then you look on the kitchen table, in your bathroom, everywhere. After 5 minutes, you FIND it under a scarf on your bed. You say: "I'VE FOUND it!". You take the keys and leave :)