Perhaps you should try some spelling variations:
"khac khanh a snippets" » "khac manh a snippets", "khao nhanh a snippets", "khuu khanh a snippets", "khac khanh v snippets", "khac khang a snippets", "khac khanh hoa snippets", "khac khanh a slippers"
"python using java snippets" » "python using data snippets", "python using java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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