Perhaps you should try some spelling variations:
conditions et » conditions _, conditions 20th, conditions 21st
medicion un » medicion en, medicion de, medicion y
modelo del » modelo de
et cambio » el cambio, en cambio, del cambio
modelo el » modelo en, modelico el, modelo hec
un campo » un camino, un cambio, un caso
la pau » la paz

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( conditions et cambio ((modelo el) OR (modelo del)) pas ; ) or ( medicion un campo de la pau ; ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( conditions et cambio ((modelo el) OR (modelo del)) pas ; ) OR ( medicion un campo de la pau ; )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( conditions et cambio ((modelo el) OR (modelo del)) pas ; ) or ( medicion un campo de la pau ; ))".
• Adding a wildcard symbol may retrieve word variants: (( conditions et cambio ((modelo el) OR (modelo del)) pas ; ) or ( medicion un campo de la pau ; ))*.