Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"huu hoi trac snippets" » "huu ho trac snippets", "huu hai trac snippets", "cuu hoi trac snippets", "huu hoi trach snippets", "huu hoi tran snippets", "huu hoi tac snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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 ("huu hoi trac snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("huu hoi trac snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( huu hoi trac snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("huu hoi trac snippets"))) or ("locating bug code slippers"))*.