Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"pha van lang snippets" » "pha van nang snippets", "pha va lang snippets", "pha van hang snippets", "pham van lang snippets", "phan van lang snippets", "phap van lang snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("pha van lang snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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