Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dung thu lam snippets" » "ung thu lam snippets", "dung phu lam snippets", "dung thi lam snippets", "dung thu lao snippets", "dung thu nam snippets", "dung tu lam snippets"

Try widening your search to All Fields.

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