Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"van tranh doan snippets" » "van tran doan snippets", "van trang doan snippets", "van tranh toan snippets", "van thanh doan snippets", "van ranh doan snippets", "can tranh doan snippets"
"dung java java snippets" » "dung va java 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 java java snippets") or ("van tranh doan snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van tranh doan snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van tranh doan snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van tranh doan snippets"))) or ("locating bugs code snippets"))*.