Perhaps you should try some spelling variations:
world papers » world part, world power, world peter
papers video » popovers video, posters video, leaders video
sensor them » sensor thermo, sensor thermal, sensor scheme
2018 ieee » 2019 ieee
sensor tm » sensor time, sensor tag, sensor tip

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: 2018 ieee world papers video ((sensor them) OR (sensor tm)).
• Adding a wildcard symbol may retrieve word variants: 2018 ieee world papers video ((sensor them) or (sensor tm))*.