Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"hoc van data snippets" » "hoc van dat snippets", "hoc van dao snippets", "hoc van dau snippets", "hoc dan data snippets", "hoc va data snippets", "hoc vat data 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 ("hoc van data snippets"))) or ("locating bug core snippets"))~.
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