Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dung le hang snippets" » "dung len hang snippets", "dung he hang snippets", "dung de hang snippets", "dung le hoang snippets", "dung le thang snippets", "dung le hong snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung le hang snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung le hang snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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