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", "head of late", "had of state", "read of state", "lead of state"
"mead of state" » "mead or state", "mead of hate", "mead of late", "means of state"
"heads of state" » "heads or state", "heads of hate", "heads of late", "means of state", "years of state", "hads of state", "reads of state", "leads of state"
"heads of shame" » "means of shame", "years of shame", "heads of hate", "hads of shame", "reads of shame", "leads 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 (\"mead of state\"))) OR (((\"heads of state\") OR (\"heads of shame\"))))~".
• Removing quotes may allow a broader search: (((( head of state ) OR ( mead of state ))) OR ((( heads of state ) OR ( heads of shame ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("head of state") OR ("mead of state"))) OR ((("heads of state") OR ("heads of shame"))))*.