Perhaps you should try some spelling variations:
"et lineal formulacion" » "et la formulacion", "et una formulacion", "et anexo formulacion", "en linea formulacion", "_ lineal formulacion", "en lineas formulacion"
"parte integral formulation" » "para integrar formulation"
"_ caceres formulacion" » "de caceres formulacion", "en caceres formulacion", "_ carers formulacion"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"parte integral formulation\") OR (((\"et lineal formulacion\") OR (\"_ caceres formulacion\"))))~".
• Removing quotes may allow a broader search: (( parte integral formulation ) OR ((( et lineal formulacion ) OR ( _ caceres formulacion ))))~.
• Adding a wildcard symbol may retrieve word variants: (("parte integral formulation") OR ((("et lineal formulacion") OR ("_ caceres formulacion"))))*.