Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"cac doi trinh slippers" » "cac doc trinh slippers", "cac doi tinh slippers", "cac dong trinh slippers", "cac dai trinh slippers", "cac toi trinh slippers", "cau doi trinh slippers", "cac doi trinh slippery", "cac doi trinh grippers"
"locating bug code snippets" » "locating bug core snippets", "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 ("cac doi trinh slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("cac doi trinh slippers"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("cac doi trinh slippers"))) or ("locating bug code snippets"))*.