Perhaps you should try some spelling variations:
case information » care information, based information, phase information
techniques case » techniques laser, techniques based, techniques cost
information und » informations und
developing east » development east, developing a, developing asia
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
der mobile » der mobilen, der mobil, does mobile
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
asezs. » sezs., aezs.

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

• Adding a wildcard symbol may retrieve word variants: techniques case information und der mobile communication costs 4.1 developing east asezs.*.