Perhaps you should try some spelling variations:
"goal poverty data. heilemann book" » "global poverty data. heilemann book", "total poverty data. heilemann book", "local poverty data. heilemann book", "goal poverty data. heinemann book", "goal poverty data. heidemann book", "goal poverty data. heilmann book", "goal poverty data. heilemann ebook"
"_ robust a. heitmannn books" » "_ robert a. heitmannn books", "_ robust _. heitmannn books", "_ robust cat. heitmannn books", "_ robust lca. heitmannn books", "_ robust a. heitmannn ebooks", "_ robust a. heitmann books", "_ robust a. heimann books", "_ robust a. neitmann books"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("goal poverty data. heilemann book") OR ("_ robust a. heitmannn books"))~.
• Removing quotes may allow a broader search: (( goal poverty data. heilemann book ) or ( _ robust a. heitmannn books ))~.
• Adding a wildcard symbol may retrieve word variants: (("goal poverty data. heilemann book") or ("_ robust a. heitmannn books"))*.