Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dem hoi phan snippets" » "dem phoi phan snippets", "dem hoc phan snippets", "dem hoa phan snippets", "dem toi phan snippets", "dep hoi phan snippets", "dam choi phan snippets"

Try widening your search to All Fields.

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