Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets", "using java code slippers"
"ngon doi tinh snippets" » "ngon doc tinh snippets", "ngon noi tinh snippets", "nguoi doi tinh snippets", "ngon doi trinh snippets", "ngon hoi tinh snippets", "ngon don tinh snippets", "ngon doi tinh slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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