Perhaps you should try some spelling variations:
"laboratorios farmaceuticos" » "laboratorios analiticos"
"laboratorios farmaceticos" » "laboratorios analiticos", "laboratorios medicos"
"laboratorios didacticos" » "laboratorio didactico", "laboratorios medicos", "laboratorios analiticos"
"laboratorios practicos" » "laboratprio practico", "laboratorios analiticos", "laboratorios previos"

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: (("laboratorios practicos") OR ((((("laboratorios farmaceticos") OR ("laboratorio farmaceutico"))) OR ((("laboratorios farmaceuticos") OR ("laboratorios didacticos"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"laboratorios practicos\") or (((((\"laboratorios farmaceticos\") OR (\"laboratorio farmaceutico\"))) or (((\"laboratorios farmaceuticos\") or (\"laboratorios didacticos\"))))))~".
• Removing quotes may allow a broader search: (( laboratorios practicos ) or ((((( laboratorios farmaceticos ) OR ( laboratorio farmaceutico ))) or ((( laboratorios farmaceuticos ) or ( laboratorios didacticos ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("laboratorios practicos") or ((((("laboratorios farmaceticos") OR ("laboratorio farmaceutico"))) or ((("laboratorios farmaceuticos") or ("laboratorios didacticos"))))))*.