Perhaps you should try some spelling variations:
local poverty » global poverty, total poverty, rural poverty
poverty a » poverty _, poverty data
a robust » _ robust
book » books, ebook
ebooks » ebookss, eebooks, books, ebook, redbooks
heilmann » hellmann, helmann, keilmann
heilman » hellman, helman, keilman

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( local poverty a. (heilmann OR heitmann) book ) or ( a robust _. heilman ebooks ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( local poverty a. (heilmann OR heitmann) book ) OR ( a robust _. heilman ebooks ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( local poverty a. (heilmann OR heitmann) book ) or ( a robust _. heilman ebooks ))*".