Perhaps you should try some spelling variations:
transit system » transit systems, transport system, transport systems
a transformer » _ transformer, a transformed, 3 transformer
transformer 1 » transformer _, transformed _
system part » system pt
agua et » agua e
1 macro » _ macro, a macro, 2 macro
3 des » 3 der, 3 das, a des
3 de » 3 die, 3 der, _ de
et a » et al, et la, e a

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: (( agua ((3 de) OR (3 des)) transit system part ) OR ( agua et a transformer 1 macro ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( agua ((3 de) OR (3 des)) transit system part ) or ( agua et a transformer 1 macro ))~".
• Adding a wildcard symbol may retrieve word variants: (( agua ((3 de) OR (3 des)) transit system part ) or ( agua et a transformer 1 macro ))*.