Perhaps you should try some spelling variations:
role sproule » robert sproule, role should, role role
world role » world robert
2008 tcp » 2008 acm, 2008 two
ii third » iii third, 7 third, 8 third
2008 ts » 2008 5th, 2008 4th, 2008 9th

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