Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"van tan hoc snippets" » "van tuan hoc snippets", "van ban hoc snippets", "van tai hoc snippets", "van toan hoc snippets", "van than hoc snippets", "van van hoc snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("van tan hoc snippets"))) or ("locating bugs code snippets"))~.
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