Perhaps you should try some spelling variations:
"chon cac chat snippets" » "chon cac code snippets", "cho cac chat snippets", "thong cac chat snippets", "hoc cac chat snippets", "chon cao chat snippets", "chon cac thuat snippets", "chon cac nha 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 java java snippets") or ("chon cac chat snippets"))) or ("locating bug core snippets"))~.
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