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"
"thue van tin snippets" » "thue va tin snippets", "thuc van tin snippets", "thuy van tin snippets", "thue van tien snippets", "thue van tan snippets", "thue van thinh snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("thue 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: (((("thue van tin snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
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