Perhaps you should try some spelling variations:
than changed » than change, has changed, man changed
changed role » changed rome, changed file, changing role
john ngosong » john song
long tail » long haul
role chen » role china, role can, role cle
chen john » chown john, chen jian, chen jean
long tip » long trip, long time, long did
sein » seine, ein, seen

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 chen john ngosong sein ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((long tip) OR (long tail)) than changed role chen john ngosong sein ;.
• Adding a wildcard symbol may retrieve word variants: ((long tip) or (long tail)) than changed role chen john ngosong sein ;*.