Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong viet cua snippets" » "dong viet code snippets", "cong viet cua snippets", "dung viet cua snippets", "dang viet cua snippets", "dong viec cua snippets", "dong viet ca snippets", "dong viet qua 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 viet cua 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 viet cua snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong viet cua snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong viet cua snippets"))) or ("locating bug core snippets"))*.