Perhaps you should try some spelling variations:
"khang anh thuc snippets" » "khang sinh thuc snippets", "khang benh thuc snippets", "khuong anh thuc snippets", "khang am thuc snippets", "khang dan thuc snippets", "khang anh tu snippets", "khang anh thuc slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("khang anh thuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khang anh thuc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khang anh thuc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khang anh thuc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.