Perhaps you should try some spelling variations:
present » presente, presenta, presentan
presentaea » presenteaea, presentaaea, presentanaea, presentada, presentara, presentaba
presentean » presenteean, presentaean, presentanean, presentan, presenten, presentaban
presentana » presenteana, presentaana, presentanana, presentan, presentada, presentara
detection » deteccion

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

• If you are trying to use Boolean operators, they must be ALL CAPS: 1981 Philippine (((present OR presentaea) OR presentean) OR presentana) detection AND referendum~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "1981 Philippine (((present OR presentaea) OR presentean) OR presentana) detection and referendum~".
• Adding a wildcard symbol may retrieve word variants: 1981 Philippine (((present OR presentaea) OR presentean) OR presentana) detection and referendum*.