Perhaps you should try some spelling variations:
"quan van code snippets" » "luan van code snippets", "quan va code snippets", "quan luan code snippets", "quan van de snippets", "quan van hoe snippets", "quan van cong snippets", "quan van code slippers"
"dung co code snippets" » "dung cho code snippets", "dung cong code snippets", "dung cua code snippets", "dung cfd code snippets", "dung co code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs 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 co code snippets") or ("quan van code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung co code snippets") OR ("quan van code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung co code snippets ) or ( quan van code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung co code snippets") or ("quan van code snippets"))) or ("locating bug code snippets"))*.