Perhaps you should try some spelling variations:
communication tasks » communicative tasks, communication tools, communication tres
model developments » model development, modern developments, code developments
developments after » development chapter, development center, developments from
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
after thirty » after sirt
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 developments after thirty.*.