Perhaps you should try some spelling variations:
"international aid methodological services" » "international aid meteorological services", "international aid meteorological service", "international aid methodological choices", "international a methodological services", "international _ methodological services", "international 4 methodological services", "international bank methodological services", "international banks methodological services"
"international prices economic surveys" » "international best economic surveys", "international banks economic surveys", "international crisis economic surveys", "international brief economic surveys", "international africa's economic surveys", "international prices economic survey"

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

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