Perhaps you should try some spelling variations:
"vehicle-based real-time pi measured system" » "vehicle-based real-time pi measure system", "vehicle-based real-time pi measures system", "vehicle-based real-time pi unmeasured system", "vehicle-based real-time _ measured system", "vehicle-based real-time a measured system", "vehicle-based real-time pid measured system", "vehicle-based real-time pie measured system", "vehicle-based real-time p measured system"
"vehicle-based real-time 4 measured system" » "vehicle-based real-time 4 measure system", "vehicle-based real-time 4 measures system", "vehicle-based real-time 4 unmeasured system", "vehicle-based real-time _ measured system"

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: (("vehicle-based real-time pi measured system") OR ("vehicle-based real-time 4 measured system")).
• Removing quotes may allow a broader search: (( vehicle-based real-time pi measured system ) or ( vehicle-based real-time 4 measured system )).
• Adding a wildcard symbol may retrieve word variants: (("vehicle-based real-time pi measured system") or ("vehicle-based real-time 4 measured system"))*.