Perhaps you should try some spelling variations:
"patch surfaces measuring" » "patch spaces measuring", "patch services measuring", "patch surface ensuring", "patch surface measuring", "path surface measuring", "space surfaces measuring"
"patch sources measuring" » "patch studies measuring", "patch spaces measuring", "patch countries measuring", "dutch sources measuring", "latch source measuring", "patchy resources measuring"

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: "((\"patch surfaces measuring\") OR (\"patch sources measuring\"))".
• Removing quotes may allow a broader search: (( patch surfaces measuring ) OR ( patch sources measuring )).
• Adding a wildcard symbol may retrieve word variants: (("patch surfaces measuring") OR ("patch sources measuring"))*.