Perhaps you should try some spelling variations:
transport signal » transform signal, transport design, transport annual
transfers 2 » transfers _, transfers 3, transfers 6
signal _ » signals _
own bus » own boss, own best, own buzz
3 based » 3 base, 3 basel, 19 based
d based » bdd based, cfd based, dlt based
agus » angus, aus, ages

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: (( agus own bus transport signal _ ) OR ( guias ((3 based) OR (d based)) transfers 2 case ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( agus own bus transport signal _ ) or ( guias ((3 based) OR (d based)) transfers 2 case ))~".
• Adding a wildcard symbol may retrieve word variants: (( agus own bus transport signal _ ) or ( guias ((3 based) OR (d based)) transfers 2 case ))*.