Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"mong doi nam snippets" » "vong doi nam snippets", "dong doi nam snippets", "mong do nam snippets", "mong noi nam snippets", "mong voi nam snippets", "mong dong nam snippets"

Try widening your search to All Fields.

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