Perhaps you should try some spelling variations:
been changed » been changes, when change, man changed
when changed » when change, we changed, what changed
john wong » john song, john bonn
wong shiu » wong siu, cong shu, song shin
wang yao » yang yao, gang yao, wang tao
yang a » yang ka, yang _, yang 8

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yao) or (wang yan)) yang a ((when changed) OR (been changed)) john wong shiu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yao) OR (wang yan)) yang a ((when changed) OR (been changed)) john wong shiu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yao) or (wang yan)) yang a ((when changed) OR (been changed)) john wong shiu ;".
• Adding a wildcard symbol may retrieve word variants: ((wang yao) or (wang yan)) yang a ((when changed) OR (been changed)) john wong shiu ;*.