Perhaps you should try some spelling variations:
"killer tips series" » "killer tips secrets", "killer tips service"
"Killer ais service" » "Killer apis service", "Killer his service", "Killer als service"
killer ais » killer apps, killer app, killer a

Try widening your search to All Fields.

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: (("killer tips series") OR ("Killer ais service")).
• Removing quotes may allow a broader search: (( killer tips series ) or ( Killer ais service )).
• Adding a wildcard symbol may retrieve word variants: (("killer tips series") or ("Killer ais service"))*.