Perhaps you should try some spelling variations:
transformation sources » transformation journeys, transformation series, transformation journey
"palm oil informatics series" » "palm oil information services", "palm oil information series", "palm iv informatics series", "palm social informatics series"
farm digital » from digital, ear digital, farmers digital
sum digital » bim digital, zum digitalen, storm digital

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("palm oil informatics series") or ("((sum digital) or (farm digital)) transformation sources"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("palm oil informatics series") OR ("((sum digital) or (farm digital)) transformation sources"))*.
• Removing quotes may allow a broader search: (( palm oil informatics series ) or ( ((sum digital) or (farm digital)) transformation sources ))*.