Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
time communication » de communication, mobile communication, online communication
development case » development china
technology 3 » technology _, technology 1, technology 4
3 regularity » _ regularity, 4.3 regularity, _ irregularity
regularity 1 » regularity _, regularity 2, regularity 3
prices time » price time, prices life, prices rise
cost sector » cost vector, port sector, forest sector
1 prices » 1 price, 2 prices, do prices

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

• Adding a wildcard symbol may retrieve word variants: technology 3 regularity 1 prices time communication cost sector development case part.*.