Python - 'in' keyword and if-statements not working as expected [duplicate]

This question already has an answer here:

• Why does `a == b or c or d` always evaluate to True? [duplicate] 1 answer

I have looked for an answer to my question, but it seems there are none for my problem specifically. Which has lead me to believe this is a simple error.

def intest():

choice = raw_input("> ")

if "hello" or "world" in choice:
    print "There is hello or world in 'choice'"
elif "bye" or "cya" in choice:
    print "There is bye or cya in 'choice'"
else:
    print "Go again"
    return intest()

intest()

When run, no matter what is typed in the raw_input, the first if-statement is the one that executes. What is the problem?