Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dang mao can snippets" » "dang mau can snippets", "dung mao can snippets", "dang mam can snippets", "dang mao van snippets", "dang mao con snippets", "dang mat can snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dang mao can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang mao can snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang mao can snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang mao can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.