Perhaps you should try some spelling variations:
"industrial development forest operation" » "industrial development forests operation", "industrial development first operation", "industrial development foreign operation", "industrial development forest operations", "industrial development forestry operation", "industrial development forces operation"
"industrial development risk period" » "industrial development russia period", "industrial development review period", "industrial development rights period", "industrial development rest period", "industrial development crisis period", "industrial development first period"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("industrial development risk period") or ("industrial development forest operation"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("industrial development risk period") OR ("industrial development forest operation")).
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