Perhaps you should try some spelling variations:
local poverty » global poverty, total poverty, rural poverty
poverty a » poverty _, poverty gap, poverty map
a robust » _ robust
heitmann » heimann, heinemann, hermann
book » books, ebook
ebooks » ebookss, eebooks, books, ebook
heilman » heilmann
hellman » helpman

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