Perhaps you should try some spelling variations:
than changed » than change, has changed, man changed
changed file » change five, change fire, changed face
long tail » long haul
john wong » john song, john bonn
wong sein » ong sean, wong shiu, wong siu
long tip » long trip, long time, long did

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