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 handouts online / oxford handouts online", "oxford redbooks online / oxford redbooks online", "oxford sandboxes online / oxford sandboxes online"
"oxford indexes online / oxford indexes online" » "oxford annexed online / oxford annexed online", "oxford index online / oxford index online"
"oxford books online / oxford books online" » "oxford brooks online / oxford brooks online", "oxford book online / oxford book online", "oxford brookes online / oxford brookes online"

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 indexes online / oxford indexes online")).
• Removing quotes may allow a broader search: (((( oxford handbooks online / oxford handbooks online ) or ( oxford books online / oxford books online ))) or ( oxford indexes online / oxford indexes online )).
• Adding a wildcard symbol may retrieve word variants: (((("oxford handbooks online / oxford handbooks online") or ("oxford books online / oxford books online"))) or ("oxford indexes online / oxford indexes online"))*.