Perhaps you should try some spelling variations:
recherche land » recherche dans, recherche und, recherche prend
economic rents » economic trends, economic risks, economic reforms
land economic » land economics, poland economic, blank economic
studie der » studien des, studie uber, studium der
studi per » studi e
studia 4 » studie 4, studia a, studia 4.2

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((studia 4) or (((studi per) OR (studie der)))) recherche land economic rents ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((studia 4) OR (((studi per) OR (studie der)))) recherche land economic rents ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((studia 4) or (((studi per) OR (studie der)))) recherche land economic rents ;".
• Adding a wildcard symbol may retrieve word variants: ((studia 4) or (((studi per) OR (studie der)))) recherche land economic rents ;*.