Perhaps you should try some spelling variations:
"tran dung code snippets" » "tran dang code snippets", "tran hung code snippets", "tran quang code snippets", "tran dung cong snippets", "tran dung co snippets", "tran dung con snippets", "tran dcung code snippets"
"ung dung de snippets" » "ung dung he snippets", "ung dung dat snippets", "cung dcung de snippets"
"locating bug code 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: (((("ung dung de snippets") or ("tran dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ung dung de snippets") OR ("tran dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ung dung de snippets ) or ( tran dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ung dung de snippets") or ("tran dung code snippets"))) or ("locating bug code snippets"))*.