You do not need to enter the full name of the town. If for example you are not sure how to write a particular name, you need only enter a combination of any three letters that you are certain appear in that name. The search engine will then automatically display a list of place names which contain those three letters.
If for example you type in "Haa" you will see not only Haaksbergen and Haarlem but also Wolphaartsdijk and Chaam.
You can now select from the list the place you are looking for. This will automatically be displayed in the search field. If you now click on search, Eurocampings will display all camp sites which are located in this town.