Perhaps you should try some spelling variations:
recommendation system » recommendation systems, recommender system
technology capital » technology digital, technology coastal, technology crystal
clean development » human development, urban development
a recommendation » a recommendations, _ recommendation, 6 recommendation
development does » development data, development 1, development 1.1
system clean » systems clean, system clear, system can
formation 4 » formation 14, formation _, formation 1
does farce » does forced, der farce
4 set » _ set, a set, 2 set
set a » set _, get a

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

• Adding a wildcard symbol may retrieve word variants: technology capital formation 4 set a recommendation system clean development does farce.*.