Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van cua ong snippets" » "van cua code snippets", "vang cua ong snippets", "ban cua ong snippets", "dan cua ong snippets", "van cua cong snippets", "van cua dong snippets", "van cua song snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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