Colloquial English admits like as a conjunction, and would not be shocked at such a sentence as "Nothing succeeds like success does". In America they go ever further, and say "It looks like he was going to succeed". But in English prose neither of these will do. Like must not be treated as a conjunction. It must be
"regarded as an adjective or adverb having the additional power of directly governing nouns as if it were a preposition" (Fowler) .
So we may say "nothing succeeds like success"; but it must be "nothing succeeds as success does" and "it looks as if he were going to succeed".