Talvez debería tentar con algunhas variantes ortográficas:
informational instruments » information instruments, international instruments, information instrumental
instruments controlling » instrument control, instruments concerning, instruments construction
controlling definitions » controlling medications, conflicting definitions, control definition
sources limits » sources its, resources limited

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

• Performing a fuzzy search may retrieve terms with similar spellings: informational instruments controlling definitions ((sources limits) or (series limits))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: informational instruments controlling definitions ((sources limits) OR (series limits)).
• Adding a wildcard symbol may retrieve word variants: informational instruments controlling definitions ((sources limits) or (series limits))*.