Perhaps you should try some spelling variations:
oxford handbooks » oxford handbook, word handbooks, oxford guidebooks
"Oxford handbooks online / Oxford handbooks online" » "Oxford redbooks online / Oxford redbooks online", "Oxford books online / Oxford books online", "Oxford handbuch online / Oxford handbuch online"
oxford sandboxes » oxford handbook
"Oxford sandboxes online / Oxford sandboxes online" » "Oxford indexes online / Oxford indexes online", "Oxford sandaunet online / Oxford sandaunet online", "Oxford sandboxes ein / Oxford sandboxes ein"
"oxford handouts online / oxford handouts online" » "oxford handbuch online / oxford handbuch 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 sandboxes online / Oxford sandboxes online"))) OR ("oxford handouts online / oxford handouts online")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Oxford handbooks online / Oxford handbooks online\") OR (\"Oxford sandboxes online / Oxford sandboxes online\"))) or (\"oxford handouts online / oxford handouts online\"))".
• Removing quotes may allow a broader search: (((( Oxford handbooks online / Oxford handbooks online ) OR ( Oxford sandboxes online / Oxford sandboxes online ))) or ( oxford handouts online / oxford handouts online )).
• Adding a wildcard symbol may retrieve word variants: (((("Oxford handbooks online / Oxford handbooks online") OR ("Oxford sandboxes online / Oxford sandboxes online"))) or ("oxford handouts online / oxford handouts online"))*.