Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"rong than cua snippets" » "rong thanh cua snippets", "long than cua snippets", "song than cua snippets", "rong nhan cua snippets", "rong thai cua snippets", "rong ban cua 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: (((("dung java java snippets") or ("rong than cua snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("rong than cua snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( rong than cua snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("rong than cua snippets"))) or ("locating bug code snippets"))*.