Perhaps you should try some spelling variations:
than changed » than change, has changed, man changed
changed role » changed rome, changed file, changing role
role cogan » role can
cogan john » hogan john, morgan john, dugan john
long tail » long haul
wong sein » ong sean, wong shiu
long tip » long trip, long time, long did
wong siu » wong shiu, kong siu, wong sau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((long tip) or (long tail)) than changed role cogan john ((wong sein) OR (wong siu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((long tip) OR (long tail)) than changed role cogan john ((wong sein) OR (wong siu)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((long tip) or (long tail)) than changed role cogan john ((wong sein) OR (wong siu)) ;".
• Adding a wildcard symbol may retrieve word variants: ((long tip) or (long tail)) than changed role cogan john ((wong sein) OR (wong siu)) ;*.