"They pulled for a long time, but did not succeed."
Translation:Ili tiris dum longa tempo, sed ne sukcesis.
More info would really help.
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I'm not sure what else can be said.
if you're looking for meaningful feedback in the forum: It's always good to include:
- the whole sentence you entered
- the full correction
- any unused word tiles
- screenshot or copy-paste is best
Clear questions with full sentences are appreciated. Questions of the form "ABC is wrong because?" will often get answered, but not by me. Questions of the form "hundo?" are probably clear to the asker, but not always to the answerer.