Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"son van hung snippets" » "son van dung snippets", "son manh hung snippets", "son van duong snippets", "song van hung snippets", "san van hung snippets", "son va hung 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 ("son van hung snippets"))) or ("locating bug core snippets"))~.
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