Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"thuy van tin snippets" » "thuy san tin snippets", "thuc van tin snippets", "chu van tin snippets", "thuy van tien snippets", "thuy van tan snippets", "thuy van thinh snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("thuy van tin snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuy van tin snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
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