Perhaps you should try some spelling variations:
"base transactions and multiphase systems" » "based transactions and multiphase systems", "late transactions and multiphase systems", "based transaction and multiphase systems"
"phase transitions and multiphase systems" » "phase transition and multiphase systems"

Try widening your search to All Fields.

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: (("base transactions and multiphase systems") OR ("phase transitions and multiphase systems")).
• Removing quotes may allow a broader search: (( base transactions and multiphase systems ) or ( phase transitions and multiphase systems )).
• Adding a wildcard symbol may retrieve word variants: (("base transactions and multiphase systems") or ("phase transitions and multiphase systems"))*.