Instituto para la
Investigación Educativa
y el Desarrollo Pedagógico

Perhaps you should try some spelling variations:
"head of state" » "head or state", "head of hate", "had of state", "mead of state", "read of state"
"heads of state" » "heads or state", "heads of hate", "means of state", "years of state", "hads of state", "meads of state", "reads of state"
"heads of late" » "means of late", "years of late", "heads of latin", "hads of late", "meads of late", "reads of late"
"head of shame" » "had of shame", "mead of shame", "read of shame"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"head of state\") OR (\"head of shame\"))) OR (((\"heads of state\") OR (\"heads of late\"))))~".
• Removing quotes may allow a broader search: (((( head of state ) OR ( head of shame ))) OR ((( heads of state ) OR ( heads of late ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("head of state") OR ("head of shame"))) OR ((("heads of state") OR ("heads of late"))))*.