Perhaps you should try some spelling variations:
than changed » than change, has changed, man changed
changed role » changed rome, changed file, changing role
long tail » long haul
chen john » chown john, chen jian, chen jean
song sein » song shin, song jin, song min
long tip » long trip, long time, long did
can john » can join, cogan john, gain john

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