Perhaps you should try some spelling variations:
"et integral formulation" » "et lineal formulacion", "e integral formulation", "_ integral formulation", "de integral formulation"
"et anexo formulacion" » "et lineal formulacion", "et de formulacion", "et una formulacion", "rey anexo formulacion", "web anexo formulacion", "6 anexo formulacion"
"i anexo formulacion" » "i lineal formulacion", "i de formulacion", "i una formulacion"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("et integral formulation") OR ((("et anexo formulacion") OR ("i anexo formulacion"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"et integral formulation\") OR (((\"et anexo formulacion\") OR (\"i anexo formulacion\"))))".
• Removing quotes may allow a broader search: (( et integral formulation ) OR ((( et anexo formulacion ) OR ( i anexo formulacion )))).
• Adding a wildcard symbol may retrieve word variants: (("et integral formulation") OR ((("et anexo formulacion") OR ("i anexo formulacion"))))*.