Perhaps you should try some spelling variations:
international investments » international investors, international instruments, international developments
international investment » international investors, international development
administrative services » administrative offices, administrative fees, administrative barriers
services monographs » series monographs, sciences monographs, studies monographs

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((international investments) OR (international investment)) of administrative services monographs ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((international investments) OR (international investment)) of administrative services monographs ;".
• Adding a wildcard symbol may retrieve word variants: ((international investments) OR (international investment)) of administrative services monographs ;*.