Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong luan den snippets" » "dong luan code snippets", "dung luan den snippets", "tong luan den snippets", "dong xuan den snippets", "dong quan den snippets", "dong luan de snippets", "dong luan len 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 ("dong luan den snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong luan den snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong luan den snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong luan den snippets"))) or ("locating bug core snippets"))*.