Perhaps you should try some spelling variations:
"oxford handbooks online / oxford handbooks online" » "oxford handbook online / oxford handbook online", "word handbooks online / word handbooks online", "oxford guidebooks online / oxford guidebooks online", "oxford redbooks online / oxford redbooks online", "oxford sandboxes online / oxford sandboxes online", "oxford handbook define / oxford handbook define"
oxford handbuch » oxford handbook
"Oxford handbuch online / Oxford handbuch online" » "Oxford handbuch eine / Oxford handbuch eine"
"oxford books online / oxford books online" » "oxford brooks online / oxford brooks online", "oxford book online / oxford book online", "oxford brookes online / oxford brookes online"

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: (((("oxford handbooks online / oxford handbooks online") OR ((("Oxford handouts online / Oxford handouts online") OR ("Oxford handbuch online / Oxford handbuch online"))))) OR ("oxford books online / oxford books online")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"oxford handbooks online / oxford handbooks online\") or (((\"Oxford handouts online / Oxford handouts online\") OR (\"Oxford handbuch online / Oxford handbuch online\"))))) or (\"oxford books online / oxford books online\"))".
• Removing quotes may allow a broader search: (((( oxford handbooks online / oxford handbooks online ) or ((( Oxford handouts online / Oxford handouts online ) OR ( Oxford handbuch online / Oxford handbuch online ))))) or ( oxford books online / oxford books online )).
• Adding a wildcard symbol may retrieve word variants: (((("oxford handbooks online / oxford handbooks online") or ((("Oxford handouts online / Oxford handouts online") OR ("Oxford handbuch online / Oxford handbuch online"))))) or ("oxford books online / oxford books online"))*.