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

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 sources"))) OR ("levant supplementary services"))) OR ("levant supplementary queries")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"Levant supplementary series\") OR (\"Levant supplementary sources\"))) or (\"levant supplementary services\"))) or (\"levant supplementary queries\"))".
• Removing quotes may allow a broader search: (((((( Levant supplementary series ) OR ( Levant supplementary sources ))) or ( levant supplementary services ))) or ( levant supplementary queries )).
• Adding a wildcard symbol may retrieve word variants: (((((("Levant supplementary series") OR ("Levant supplementary sources"))) or ("levant supplementary services"))) or ("levant supplementary queries"))*.