In many instances we use more than one word to describe the entity we are researching, whether that be
a place (united kingdom, Saudi arabia, united states),
a person (eugenio barba, pina bausch, charlie chaplin)
or a concept (youth culture, theatre of the oppressed, ensemble theatre).
In order for the database to understand that you want to find these words strictly together you can put them within quotation marks.
A search in our JSTOR subscription for drama therapy gave 2032 results. By contrast a search for this as the phrase “drama therapy” gave 81. In each of those 81 cases the words drama and therapy appeared right next to each other, in the order specified, to find just that phrase.
Now let's turn to consider Spelling.