Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"dung trinh tro slippers" » "dung tinh tro slippers", "dong trinh tro slippers", "cong trinh tro slippers", "dung trinh tru slippers", "dung trinh trong slippers", "dung trinh tren slippers", "dung trinh tro slippery", "dung trinh tro 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 ("dung trinh tro slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("dung trinh tro slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dung trinh tro slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dung trinh tro slippers"))) or ("locating bug code snippets"))*.