Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duc dung co snippets" » "duc dung code snippets", "duc hung co snippets", "duc cuong co snippets", "duc phung co snippets", "duc dung cho snippets", "duc dung cong snippets", "duc dung cua 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: (((("duc dung co snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
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