Perhaps you should try some spelling variations:
ptt » pitt (Expand Search)
assiri » bassiri (Expand Search), hnassiri (Expand Search), snassiri (Expand Search)
assisteds » assists (Expand Search), asisteds (Expand Search), ashisteds (Expand Search), assesteds (Expand Search)
assisted » asisted (Expand Search), ashisted (Expand Search), assested (Expand Search)
assist » asist (Expand Search), ashist (Expand Search), assest (Expand Search)
assis » asis (Expand Search), ashis (Expand Search), asses (Expand Search)

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: "((ptt OR bias) OR pit) francis of ((assiri OR ((assisteds OR assisted) OR assist)) OR assis)~".
• Adding a wildcard symbol may retrieve word variants: ((ptt OR bias) OR pit) francis of ((assiri OR ((assisteds OR assisted) OR assist)) OR assis)*.