Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developing joint » developing coping, development joint, developing ict
technology port » technology report, technology export, technology park
port operation » port operations, court operations, plant operation
operation gap » operational gap, operation amp, operation a
4 developing » 3 developing
6 personal » a personal, 1 personal, 4 personal
costs 4 » costs _, costs a, costs 4.2
gap 6 » gap _, gap 4, gap a

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

• Adding a wildcard symbol may retrieve word variants: technology port operation gap 6 personal communication costs 4 developing joint africa.*.