Your word puzzle could need the spelled with/contains filter instead of letters. Searching for "the letters ahnprty" is not the same as words "spelled with ahnprty". You must say "spelled with" or "contains" in your word search. For large sets of characters to decode, use the unscrambler.
Page 1: dichlorodiphenyltrichloroethane, dimethyltryptamine, sphygmomanometer, anthropology, philanthropy, hyperlipoproteinemia, hyperventilate, hyponatremia, stenography, anthroposophy, indecipherability, anthropocentricity, cinematography, anthropometry, hyperpigmentation, hyperventilation, diethyltryptamine, attorneyship, hypocriticalness, pharyngealization, electroencephalography, hypoproteinemia, antihypertensive, coryphantha, achondroplasty, triumphantly, anthropolatry, Gymnospermophyta, pharyngitis, tryptophan, laryngopharyngitis, hypolipoproteinemia, hypnotherapy, hyperadrenocorticism, christophany, platyrhine, hyperbetalipoproteinemia, oophorosalpingectomy, polytetrafluoroethylene, chronophotography, Hymenoptera, thrombocytopenia, panhypopituitarism, hypervitaminosis, hymenopteran, Acanthopterygii, Pythagorean, rhinoplasty, psychogalvanometer, and ethnography