Search the installment
John Wick is also a series name, so include the installment when looking for a later film. Check the year and full title rather than assuming the first result is the one you meant.
Start with release order
For a first watch, the original film establishes the central character and world. Later numbered chapters build on that foundation. For a rewatch, save the particular entry you want instead of treating the whole series as one movie.
If there is no match
The VexMovies catalog does not currently include every John Wick entry. Try the action-and-crime collection for another film, including close-quarters action such as The Raid. For John Wick itself, search the full title on your preferred viewing service.