Perhaps you should try some spelling variations:
"dung trong code snippets" » "dung trong cong snippets", "dung trong co snippets", "dung trong che snippets", "dung trong code slippers"
"van hac code snippets" » "van hac de snippets", "van hoc code snippets", "van ha code snippets", "van hai code snippets", "van hac 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: (((("van hac code snippets") or ("dung trong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hac code snippets") OR ("dung trong code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hac code snippets ) or ( dung trong code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hac code snippets") or ("dung trong code snippets"))) or ("locating bug code snippets"))*.