Perhaps you should try some spelling variations:
"online line research documents" » "online line search document", "online line research arguments", "online line research comments", "online online research documents", "online linked research documents", "online line search documents", "online eine research documents", "online life research documents", "online live research documents"
"online chapter6 research elements" » "online chapter research elements", "online chapter1 research elements", "online chapter5 research elements", "online chapter6 research experiments", "online chapter6 research effects", "online chapter6 research students", "online chapters research elements", "online chapter9 research elements"

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: (("online line research documents") OR ("online chapter6 research elements"))*.
• Removing quotes may allow a broader search: (( online line research documents ) or ( online chapter6 research elements ))*.