Perhaps you should try some spelling variations:
communication 12.4.5 » communication 10.2.5, communication 10.4.3, communication 12.1.1
voce communication » voice communication, vote communication, voice communications
developing east » development east, developing a, developing asia
technologies 4 » technologies _
4 information » 2 information, 1 information
east africa » west africa
a der » _ der, 2 der, 3 der
a de » a die, a des, _ de

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 4 information ((a de) OR (a der)) voce communication 12.4.5 _ developing east africa.~".
• Adding a wildcard symbol may retrieve word variants: technologies 4 information ((a de) OR (a der)) voce communication 12.4.5 _ developing east africa.*.