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Capitalization is ignored. george bush will find everything on our site with the word george AND the word bush. george -bush will find everything with the word george that does NOT have the word bush in it. Searches for letters and numbers work best; including punctuation characters could give unreliable results. You can use "quotation marks" in order to make sure that the words appear in the text exactly as entered between the quotation marks. Be careful when searching for non-English letters/characters: a search for the name "Munoz" will not find the name "Muñoz" (and vice-versa).