Perhaps you should try some spelling variations:
"hong anh trong snippets" » "hong anh thuong snippets", "hong dinh trong snippets", "hong lang trong snippets", "hoang anh trong snippets", "hong hanh trong snippets", "dong anh trong snippets", "hong anh trong 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: (((("hong anh trong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hong anh trong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hong anh trong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hong anh trong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.