Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
based communications » based communication, speed communications, aided communications
scars development » scar development, scale development, asia's development
21st information » cost information, ist information, asset information
technology 21st » technology 2.1.1, technology 2.1.2, technology 2.1.3
information 1.2 » information 1.5.2, information 2
aes based » ses based, areas based, cases based
1 afrique » l afrique, en afrique, 1 enrique
1.2 aes » 1.2 aims, 1.2 apfs, 1.2 arts

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology 21st information 1.2 aes based communications costs scars development 1 afrique.*.