Perhaps you should try some spelling variations:
communication tasks » communicative tasks, communication tools, communication tres
development master » development matters, development chapter, development pattern
model development » local development, social development, global development
de communication » mobile communication, online communication
technology les » technology led, technology lays, technology lead
relations cost » relations post, relations cross, relations case
les relations » rules regulations
master thirty » after thirty, chapter thirty
tasks model » task model, task models, banks models
cost time » costs time, past time, best time
time de » time die, estime de, time done

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

• Adding a wildcard symbol may retrieve word variants: technology les relations cost time de communication tasks model development master thirty.*.