Perhaps you should try some spelling variations:
transformed since » transformed bill, transformed three, transformer using
a transformed » _ transformed, _ transformer, a transforming
since across » science across, space across, finance across
bias index » bios index
index a » index _
luis a » luis f, luis c
a heat » a heart, _ heat, a head

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: (( bias index a transformed since across ) OR ( luis a heat transfer _ maria ))~.
• Adding a wildcard symbol may retrieve word variants: (( bias index a transformed since across ) or ( luis a heat transfer _ maria ))*.