Perhaps you should try some spelling variations:
"oxford handbook online / oxford handbook online" » "oxford handbuch online / oxford handbuch online", "oxford handbook define / oxford handbook define", "oxford handbook enhance / oxford handbook enhance"
"oxford facebook online / oxford facebook online" » "oxford facebook content / oxford facebook content"
"oxford handouts online / oxford handouts online" » "oxford handbuch online / oxford handbuch online", "oxford handouts one / oxford handouts one"

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