Perhaps you should try some spelling variations:
"dan trinh code snippets" » "dan trinh cong snippets", "dan trinh co snippets", "dan trinh cad snippets", "dan tinh code snippets", "van trinh code snippets", "hanh trinh code snippets", "dan trinh code slippers"
"dung va java snippets" » "dung java java snippets", "dung va java 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 va java snippets") or ("dan trinh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("dan trinh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( dan trinh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("dan trinh code snippets"))) or ("locating bug code snippets"))*.