Perhaps you should try some spelling variations:
22greek literature » greek literature, grey literature, street literature
27 criticism » 7 criticism, 2nd criticism, 31 criticism
2.1 textual » 2.2 textual, 2.3 textual, 8.1 textual
2.6 textual » 2.2 textual, 2.3 textual, 2 textual

Try widening your search to All Fields.

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: "%22greek literature %27 criticism%((2.1 textual) OR (2.6 textual))%22".
• Adding a wildcard symbol may retrieve word variants: %22greek literature %27 criticism%((2.1 textual) OR (2.6 textual))%22*.