Perhaps you should try some spelling variations:
diritto tributario » tirant tributario, derecho tributario, ambito tributario
gaceta tributana » gaceta tributaria
deuda tributana » deuda tributaria, deudas tributarias
tributario » tributariao, tributariaso, tributarioso
tributari » tributaria, tributarias, tributarios

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((diritto tributario) or (((((gaceta tributana) or (deuda tributana))) or (dret tributari))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((diritto tributario) OR (((((gaceta tributana) OR (deuda tributana))) OR (dret tributari)))).
• Adding a wildcard symbol may retrieve word variants: ((diritto tributario) or (((((gaceta tributana) or (deuda tributana))) or (dret tributari))))*.