Perhaps you should try some spelling variations:
"word handbooks online / word handbooks online" » "word handouts online / word handouts online", "word books online / word books online", "word handbuch online / word handbuch online", "work handbooks online / work handbooks online", "art handbooks online / art handbooks 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"
"word redbooks online / word redbooks online" » "word books online / word books online", "word netbook online / word netbook online"
"oxford brookes online / oxford brookes online" » "lord brookes online / lord brookes online", "oxford books online / oxford books online", "oxford bodies online / oxford bodies online", "oxford routes online / oxford routes 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: (((((("word handbooks online / word handbooks online") OR ("word redbooks online / word redbooks online"))) OR ("oxford brookes online / oxford brookes online"))) OR ("oxford sandboxes online / oxford sandboxes online")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"word handbooks online / word handbooks online\") OR (\"word redbooks online / word redbooks online\"))) or (\"oxford brookes online / oxford brookes online\"))) or (\"oxford sandboxes online / oxford sandboxes online\"))".
• Removing quotes may allow a broader search: (((((( word handbooks online / word handbooks online ) OR ( word redbooks online / word redbooks online ))) or ( oxford brookes online / oxford brookes online ))) or ( oxford sandboxes online / oxford sandboxes online )).
• Adding a wildcard symbol may retrieve word variants: (((((("word handbooks online / word handbooks online") OR ("word redbooks online / word redbooks online"))) or ("oxford brookes online / oxford brookes online"))) or ("oxford sandboxes online / oxford sandboxes online"))*.