Perhaps you should try some spelling variations:
"international forestry economic surveys" » "international investors economic surveys", "international best economic surveys", "international forest economics surveys", "international country economic surveys", "international foreign economic surveys", "international forestry economic studies", "international forestry economic systems"
"international service economy series" » "international price economy series", "international series economy series", "international rice economy series", "international service economics series"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("international forestry economic surveys") or ("international service economy series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international forestry economic surveys") OR ("international service economy series")).
• Removing quotes may allow a broader search: (( international forestry economic surveys ) or ( international service economy series )).
• Adding a wildcard symbol may retrieve word variants: (("international forestry economic surveys") or ("international service economy series"))*.