Translation:What did you do during spring break?
"Spring break" is kind of a fixed phrase, at least in the US.
Plus "vacation" is usually used for a contiguous period of vacation. You could say "vacations" if you had days of work mixed into the period you were referring to, so it is multiple "vacations". "Holiday" has connotation of purpose/ memorialized celebration (from "holy-day"). So Christmas and New Year's are separate holidays, but both are in "winter vacation" or "winter break". I think "holiday" might be used a little more loosely in the UK.