Instituto para la
Investigación Educativa
y el Desarrollo Pedagógico

Perhaps you should try some spelling variations:
"head of state" » "head of hate", "head of late", "had of state", "read of state", "ead of state"
"heads of state" » "heads of hate", "heads of late", "means of state", "years of state", "hads of state", "reads of state", "eads of state"
"mead of shame" » "mead of hate", "means of shame"
"lead or state" » "leal or state", "led or state", "lean or state"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("head of state") OR ("mead of shame"))) OR ("lead or state"))) OR ("heads of state"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"head of state\") OR (\"mead of shame\"))) OR (\"lead or state\"))) OR (\"heads of state\"))".
• Removing quotes may allow a broader search: (((((( head of state ) OR ( mead of shame ))) OR ( lead or state ))) OR ( heads of state )).
• Adding a wildcard symbol may retrieve word variants: (((((("head of state") OR ("mead of shame"))) OR ("lead or state"))) OR ("heads of state"))*.