Perhaps you should try some spelling variations:
"locating bug code slippers" » "locating bug code snippets", "locating bung code slippers", "locating bugs code slippers"
"python using java snippets" » "python using data snippets"
"van van dinh snippets" » "van van minh snippets", "van van dich snippets", "van va dinh snippets", "van ban dinh snippets", "tan van dinh snippets", "san van dinh snippets"

Try widening your search to All Fields.

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