Perhaps you should try some spelling variations:
"Levant supplementary services" » "Levant supplementary exercises"
"Levant supplementary queries" » "Levant supplementary exercises", "Levant supplementary studies", "Levant supplementary materials"
"levant supplementary series" » "eleven supplementary series", "level supplementary series", "cleaner supplementary series", "levant supplementary steroids", "levant supplementary studies", "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 queries") OR ("Levant supplementary services")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"levant supplementary series\") or (((\"Levant supplementary queries\") OR (\"Levant supplementary services\"))))".
• Removing quotes may allow a broader search: (( levant supplementary series ) or ((( Levant supplementary queries ) OR ( Levant supplementary services )))).
• Adding a wildcard symbol may retrieve word variants: (("levant supplementary series") or ((("Levant supplementary queries") OR ("Levant supplementary services"))))*.