Perhaps you should try some spelling variations:
"online ai research elements" » "online ai research experiments", "online ai research students", "online ai research contents", "online ii research elements", "online i research elements", "online iii research elements", "online a research elements", "online ad research elements", "online ac research elements"
"online chapter1 research effects" » "online chapter research effects", "online chapter5 research effects", "online chapter6 research effects", "online chapter1 research efforts", "online chapter1 research aspects", "online chapter1 research projects", "online chapters research effects", "online chapter9 research effects"

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 ai research elements") OR ("online chapter1 research effects"))*.
• Removing quotes may allow a broader search: (( online ai research elements ) or ( online chapter1 research effects ))*.