Perhaps you should try some spelling variations:
implementation 16 » implementation 6, implementation 100, implementation _
implementation 1 » implementation 10, implementation 11, implementation 14
users concepts » use concepts, clusters concepts, museums concepts
car users » card users, cad users, car user
curtan-metragem » curtain-metragem, curtin-metragem, cartan-metragem

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: car users concepts ((implementation 1) OR (implementation 16)) curtan-metragem~.
• Adding a wildcard symbol may retrieve word variants: car users concepts ((implementation 1) or (implementation 16)) curtan-metragem*.