Perhaps you should try some spelling variations:
"national investment policies series" » "international investment policies series", "capital investment policies series", "national treatment policies series", "national investment policy series", "national government policies series", "national development policies series", "national investment politics series"
"industrial development aid series" » "industrial development a series", "industrial development africa series", "industrial development agenda series", "industrial development aid services", "industrial development mind series", "industrial development d series"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("national investment policies series") or ("industrial development aid series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("national investment policies series") OR ("industrial development aid series")).
• Removing quotes may allow a broader search: (( national investment policies series ) or ( industrial development aid series )).
• Adding a wildcard symbol may retrieve word variants: (("national investment policies series") or ("industrial development aid series"))*.