Perhaps you should try some spelling variations:
role sproule » robert sproule, role should, role role
world role » world robert
sproule 11 » spruce 11
2008 tcp » 2008 ts, 2008 two
2008 acm » 2008 a, 2008 a2, 2008 a1
11 third » 2011 third, 3 third, 7 third

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: "((2008 tcp) OR (2008 acm)) world role sproule 11 third".
• Adding a wildcard symbol may retrieve word variants: ((2008 tcp) OR (2008 acm)) world role sproule 11 third*.