Perhaps you should try some spelling variations:
communication model » communication media
2.4 communication » 2.14 communication, 5.4 communication, 2.3 communication
tree development » three development, trade development, green development
development des » development does, development desd, development ds
technology 3.1 » technology 1, technology 2.2, technology _
isolation haus » isolation auf, isolation bus, isolation class
3.1 isolation » 3.2 isolation, 3.3 isolation, 8.1 isolation
des afrique » en afrique, de l'afrique
haus price » has price, cause price, gas price
model tree » model three, model free, model true
price 2.4 » prices 2.4, price 2.3, price 4.4

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

• Adding a wildcard symbol may retrieve word variants: technology 3.1 isolation haus price 2.4 communication model tree development des afrique.*.