Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"hanh van tin snippets" » "thanh van tin snippets", "khanh van tin snippets", "hanh va tin snippets", "hanh van tien snippets", "hanh van tan snippets", "hanh van thinh snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("hanh van tin snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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