Perhaps you should try some spelling variations:
"international asean economic surveys" » "international asia economic surveys", "international afghan economic surveys", "international assets economic surveys", "international asean economic studies", "international asean economic systems", "international asian economic surveys", "international taiwan economic surveys", "international urban economic surveys"
"national post economy series" » "national post economics series", "national port economy series", "national postal economy series", "national power economy series", "national host economy series", "national post economic series", "national forest economy series"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("national post economy series") OR ("international asean economic surveys"))~.
• Removing quotes may allow a broader search: (( national post economy series ) or ( international asean economic surveys ))~.
• Adding a wildcard symbol may retrieve word variants: (("national post economy series") or ("international asean economic surveys"))*.