Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong van ca snippets" » "duong van ca snippets", "dang van ca snippets", "dong von ca snippets", "dong van cau snippets", "dong van cua snippets", "dong dan ca 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 ca 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 ca snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong van ca snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong van ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.