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 (1991) 124 - 2:
PROPOSAL FOR A COUNCIL REGULATION ( EEC ) ON THE TRANSITIONAL PERIOD FOR THE FREEDOM OF MOVEMENT OF WORKERS BETWEEN SPAIN
AND PORTUGAL AND THE OTHER MEMBER STATES