Perhaps you should try some spelling variations:
"industrial investment treaties series" » "industrial investments treaties series", "industry investment treaties series", "initial investment treaties series", "industrial investment strategies series", "industrial investment activities series", "industrial investment incentives series", "industrial investment textiles series", "industrial investment theories series", "industrial investment forestiers series"
"industrial development d services" » "industrial development ds services", "industrial development 1 services", "industrial development did services", "industrial development e services", "industrial development data services", "industrial development debt services"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("industrial investment treaties series") OR ("industrial development d services"))~.
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