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).
COM (1983) 281:
PROPOSAL FOR A COUNCIL DIRECTIVE AMENDING DIRECTIVE 80/181/EEC ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES RELATING
TO UNITS OF MEASUREMENT