Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trong su cach snippets" » "trong san cach snippets", "trong thu cach snippets", "trong qua cach snippets", "trong su sach snippets", "trong tu cach snippets", "trong su cac 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: (((("trong su cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong su cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong su cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong su cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.