Use quotation marks to search for an "exact phrase". Append an asterisk (*) to a search term to find variations of it (transp*, 32019R*). Use a question mark (?) instead of a single character in your search term to find variations of it (ca?e finds case, cane, care).
Query: (PS_ID="prot:1980:3397:corrigendum:1981-03-24:oj" OR (AGREEMENT_INTERNATIONAL_NUMBER_NATURAL=3397 AND AGREEMENT_INTERNATIONAL_YEAR=1980 AND FM_CODED=PROT OR AGREE_PROT AND DTC=false)) NOT ELI = NULL, Search language: English