Perhaps you should try some spelling variations:
"dung vean code snippets" » "dung van code snippets", "dung va code snippets", "dung luan code snippets", "dung vaean code snippets", "dung viean code snippets", "dung veean code snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung v code snippets" » "dung va code snippets", "dung vi code snippets", "dung ve code snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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