Perhaps you should try some spelling variations:
"anh tran hoang snippets" » "anh quan hoang snippets", "anh tran quang snippets", "anh tranh hang snippets", "anh tuan hoang snippets", "anh toan hoang snippets", "anh trac hoang snippets", "anh tran hoang slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers", "dung bug core snippets"
"locating bug code snippets" » "locating bug code slippers", "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: (((("anh tran hoang snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh tran hoang snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh tran hoang snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh tran hoang snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.