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="dec_impl:2014:641:corrigendum:2014-10-16:oj" OR (DTN_ELI=641 AND DTA=2014 AND FM_CODED=DEC_IMPL AND DTC=false)) NOT ELI = NULL, Search language: English