Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"trac sach xa slippers" » "trac bach xa slippers", "toc sach xa slippers", "rau sach xa slippers", "trac sach dao slippers", "trac sach nha slippers", "trac sach bai slippers", "trac sach xa slippery", "trac sach xa 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 ("trac sach xa slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("trac sach xa slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( trac sach xa slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("trac sach xa slippers"))) or ("locating bug code snippets"))*.