Perhaps you should try some spelling variations:
information sources » information resources, information services, information security
isolation sources » innovation sources, irrigation sources, isolation outcomes
data transmission » gas transmission, _ transmission, hiv transmission
nepal social » legal social, deal social, real social
lines » line

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( nepal social ((isolation sources) OR (information sources)) ) OR ( _ data transmission lines ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( nepal social ((isolation sources) OR (information sources)) ) or ( _ data transmission lines ))~".
• Adding a wildcard symbol may retrieve word variants: (( nepal social ((isolation sources) OR (information sources)) ) or ( _ data transmission lines ))*.