adv: cat or dog or bird and custody
cat or dog /10 custody /10 contract!
cat or dog /50 custody /10 contract!
adv: cat and dog or bird and custody
For this one, either dog or bird or both can be in the document. Cat has to be in the document and custody has to be in the document.
adv: (cat and dog) or bird and custody
For this one, cat and dog both have to be in the document or just bird. Custody must also be in the document.
Note: adv. To indicate a Boolean search in Westlaw. If you type in a search with only AND/OR connectors, you must type Advanced: or Adv: in order for it to run as a terms and connectors search, not a natural language search.