Perhaps you should try some spelling variations:
changed john » changed our, changed post, changed rome
change john » chasse john, change japan, channon john
yang yang » wang yang, wang yan
shang hai » shang kai, dang hai, chang ha
tan yang » dan yang, tan ying, tan yong
judy 19 » judy 1952, judy 1953, study 19

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tan yang yang judy 19 ((changed john) OR (change john)) ((shang hai) OR (wang hua)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tan yang yang judy 19 ((changed john) OR (change john)) ((shang hai) or (wang hua)) ;~".
• Adding a wildcard symbol may retrieve word variants: tan yang yang judy 19 ((changed john) OR (change john)) ((shang hai) or (wang hua)) ;*.