Perhaps you should try some spelling variations:
"municipal investment policies series" » "municipal investments policies series", "municipal government policies series", "municipal governments policies series", "municipal investment policy series", "municipal development policies series", "municipal 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.

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