Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"het cho phan snippets" » "het co phan snippets", "het hoc phan snippets", "het hoa phan snippets", "chat cho phan snippets", "hiem cho phan snippets", "thep cho phan snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("het cho 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: (((("het cho phan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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