Perhaps you should try some spelling variations:
british class » british coasts, british claim, british case
british glass » british grasses, british goods, british alarm
"British glass systems" » "British loss systems", "British mass systems"
"British class system" » "British mass system", "British loss system", "British cross system"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"British class system\") OR (\"British glass systems\"))".
• Removing quotes may allow a broader search: (( British class system ) OR ( British glass systems )).
• Adding a wildcard symbol may retrieve word variants: (("British class system") OR ("British glass systems"))*.