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

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