Perhaps you should try some spelling variations:
multilayered reservoirs » multilayer reservoir, multilayered reflectors
multilayered reservoir » multilayered research
multipole reservoir » multiple reservoir, multiple reservoirs, multipurpose reservoir
multi reservoirs » multi reservoir, multiple reservoirs, belt reservoirs

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: ((((((multipole reservoir) OR (multi reservoirs))) OR (multilayered reservoirs))) OR (multilayered reservoir)).
• Adding a wildcard symbol may retrieve word variants: ((((((multipole reservoir) or (multi reservoirs))) or (multilayered reservoirs))) or (multilayered reservoir))*.