Perhaps you should try some spelling variations:
data communication » data communications
coinfection guide » collection guide, coinfection model
hiv coinfection » hiv infection, hiv infections, _ coinfection
technology hiv » technology have, technology high, technology how
development li » development lid, development lie, development lin
4 development » 2 development, 4 developing
guide series » trade series
li afrique » l afrique, en afrique
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology hiv coinfection guide series data communication costs 4 development li afrique.*.