Perhaps you should try some spelling variations:
factor » factors, factosr, faltor, factr, faceor
factores » factorses, factosres, faltores, factres, faceores
factr » facts, facto, facer
acto » actos, alto, act
actors » actosrs, altors, actrs, factors, actores, actos
fact » face
fautores » autores, fatores, coautores

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: "Peter McDonald ((((factor OR factr) OR acto) OR (fact OR ((fautores OR factores) OR actors))))~".
• Adding a wildcard symbol may retrieve word variants: Peter McDonald ((((factor OR factr) OR acto) OR (fact OR ((fautores OR factores) OR actors))))*.