Perhaps you should try some spelling variations:
"international journal hydrological services" » "international journal meteorological services", "international natural hydrological services", "international global hydrological services"
"international policy economy series" » "international poverty economy series", "international prices economy series", "national policy economy series", "international policy economic series", "international polish economy series", "international politics economy series", "international policy 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 policy economy series") or ("international journal hydrological services"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international policy economy series") OR ("international journal hydrological services"))*.
• Removing quotes may allow a broader search: (( international policy economy series ) or ( international journal hydrological services ))*.