They refer to different concepts.
Verb phrase refers to the verb itself plus its objects or complements;
phrasal verb refers to a type of verb consisting of a verb plus a particle, normally with an idiomatic meaning. For example,
walked to the shops is a verb phrase in
I walked to the shops, which consists of a verb (
walked) and its prepositional complement (
to the shops).
Look up is a phrasal verb in
I looked up the word in the dictionary. They refer not only to different concepts but also to concepts of different orders.
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