Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong van cua snippets" » "duong van cua snippets", "dang van cua snippets", "dong von cua snippets", "dong vang cua snippets", "dong ban cua snippets", "dong dan 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: (((("dong van cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong van cua snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong van cua snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong van cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.