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"
"van hong ha snippets" » "van phong ha snippets", "van hoang ha snippets", "van huong ha snippets", "van dong ha snippets", "van cong ha snippets", "van long ha snippets"

Try widening your search to All Fields.

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