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

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 filologica ((e litterature) OR (et litterature))".
• Adding a wildcard symbol may retrieve word variants: oral phase study die filologica ((e litterature) OR (et litterature))*.