Perhaps you should try some spelling variations:
"comercio interno" » "mercado interno"
"comercio intra" » "comercio iptc", "comercio industria", "comercio historia"
"comercio entre" » "comercio en"
"comercio para" » "comercial para", "comercio pasto", "comercio san"
"comercio ica" » "comercio sic", "comercio local", "comercio de"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("comercio exterior") or ((((((((("comercio intra") OR ("comercio ica"))) or ("comercio interno"))) or ("comercio entre"))) or ("comercio para"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comercio exterior") OR ((((((((("comercio intra") OR ("comercio ica"))) OR ("comercio interno"))) OR ("comercio entre"))) OR ("comercio para")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"comercio exterior\") or (((((((((\"comercio intra\") OR (\"comercio ica\"))) or (\"comercio interno\"))) or (\"comercio entre\"))) or (\"comercio para\"))))".
• Removing quotes may allow a broader search: (( comercio exterior ) or ((((((((( comercio intra ) OR ( comercio ica ))) or ( comercio interno ))) or ( comercio entre ))) or ( comercio para )))).
• Adding a wildcard symbol may retrieve word variants: (("comercio exterior") or ((((((((("comercio intra") OR ("comercio ica"))) or ("comercio interno"))) or ("comercio entre"))) or ("comercio para"))))*.