Perhaps you should try some spelling variations:
"dung hoc cham snippets" » "dung hoc code snippets", "dong hoc cham snippets", "dung thuoc cham snippets", "trung hoc cham snippets", "dung toc cham snippets", "dung hoc chat snippets", "dung hoc chan snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung hoc cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hoc cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
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