Perhaps you should try some spelling variations:
et litterature » la litterature, art literature
die filologia » de filologia, e filologia, de fisiologia
di filologia » di filosofia
phase study » case study, acase study, phase studies
oral phase » normal phase, local phase, dual phase

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "oral phase study ((die filologia) OR (di filologia)) et litterature".
• Adding a wildcard symbol may retrieve word variants: oral phase study ((die filologia) OR (di filologia)) et litterature*.