Perhaps you should try some spelling variations:
"river revetment analysis." » "river investment analysis.", "river element analysis.", "river movement analysis.", "river development analysis."
"five elements analysis." » "five element analysis.", "like elements analysis.", "finite elements analysis.", "core elements analysis."
"five plants analysis." » "fibre plants analysis.", "rice plants analysis.", "free plants analysis."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("river revetment analysis.") or ((("five elements analysis.") OR ("five plants analysis."))))~.
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