Perhaps you should try some spelling variations:
sozialgeschichte lower » sozialgeschichte der, sozialgeschichte des
zur sozialgeschichte » zur zeitgeschichte
lower literacy » low literacy, core literacy, lower latency
und texts » und texte, und text, und texto
texts zur » texte zur, texte zu, text zum

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (studien or studies) und texts zur sozialgeschichte lower literacy survey~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (studien OR studies) und texts zur sozialgeschichte lower literacy survey.
• Adding a wildcard symbol may retrieve word variants: (studien or studies) und texts zur sozialgeschichte lower literacy survey*.