Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"ban van cau snippets" » "ban van code snippets", "ban dan cau snippets", "ban va cau snippets", "tan van cau snippets", "ban van dau snippets", "ban van hau snippets", "ban van chat 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: (((("ban van cau snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban van cau snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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