Perhaps you should try some spelling variations:
"levant supplementary services" » "levant supplementary exercises", "eleven supplementary services", "level supplementary services", "cleaner supplementary services"
"Levant supplementary studies" » "Levant complementary studies", "Levant supplementary study", "Levant supplementary standard"
"Levant supplementary series" » "Levant supplementary queries", "Levant supplementary steroids", "Levant supplementary sources"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("Levant supplementary series") OR ("Levant supplementary studies"))) OR ("levant supplementary services")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Levant supplementary series\") OR (\"Levant supplementary studies\"))) or (\"levant supplementary services\"))".
• Removing quotes may allow a broader search: (((( Levant supplementary series ) OR ( Levant supplementary studies ))) or ( levant supplementary services )).
• Adding a wildcard symbol may retrieve word variants: (((("Levant supplementary series") OR ("Levant supplementary studies"))) or ("levant supplementary services"))*.