Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
infection ratio » infection rates, infection rate, infection data
development lid » development led, development li, development lie
technology hpv » technology have, technology how, technology has
hpv infection » hiv infection, hiv infections, hiv coinfection
ratio price » option price
lid afrique » l afrique
price de » price _, price 3, price a
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology hpv infection ratio price de communication costs a development lid afrique.*.