Perhaps you should try some spelling variations:
model literature » models literature, model literatur, modern literature
del literature » abel literature, fuel literature, al literature
scale studies » case studies, scale study
best scale » bast scale, rest scale, burst scale
studies la » studies lab, studies lca, studies lia

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: "best scale studies la filosofia ((del literature) OR (model literature))".
• Adding a wildcard symbol may retrieve word variants: best scale studies la filosofia ((del literature) OR (model literature))*.