寻觅久了终无结果
[xún mì jiŭ le zhōng wú jié guŏ]
Translated as 'Searched for so long, but in vain', the user probably feels disappointed due to the lack of results after long efforts to seek for something (could be a person, object, achievement, etc.), wishing to convey persistence as well as the sorrow brought by futile pursuits through their username.