Perhaps you should try some spelling variations:
"online chapter1 research experiments" » "online chapter1 research experimental", "online chapter1 research experience", "online chapter1 resonance experiments", "online chapter research experiments", "online chapter5 research experiments", "online chapter6 research experiments", "online chapters research experiments", "online chapter9 research experiments"
"online chapter1 research experiences" » "online chapter1 research experience", "online chapter1 research experimental", "online chapter1 research references", "online chapter research experiences", "online chapter5 research experiences", "online chapter6 research experiences", "online chapters research experiences", "online chapter9 research experiences"
"online lin search document" » "online link search document", "online li search document", "online linux search document", "online line search document", "online levin search document"

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 lin search document") OR ((("online chapter1 research experiments") OR ("online chapter1 research experiences")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"online lin search document\") or (((\"online chapter1 research experiments\") OR (\"online chapter1 research experiences\"))))".
• Removing quotes may allow a broader search: (( online lin search document ) or ((( online chapter1 research experiments ) OR ( online chapter1 research experiences )))).
• Adding a wildcard symbol may retrieve word variants: (("online lin search document") or ((("online chapter1 research experiments") OR ("online chapter1 research experiences"))))*.