You might want to try adding some
" to your expression to differentiate between AND and OR e.g.
("Puerto Rico" AND Maria) OR ("Puerto Rico" AND "Hurricane Maria") OR (#PuertoRico AND #Maria) OR (#PuertoRico AND #HurricaneMaria) OR #HurricaneMaria OR #Maria
An example collection is here https://docs.google.com/spreadsheets/d/1YnFEVcBihC-sGrY_czPkH4LtG_vxtxAjuaHxmFz1RDI/edit#gid=203537429
[some things to note 18k tweets is the max you can collect for the Twitter API in one hit and data is only available from the last 7-9 days or 18k tweets, which ever comes first]