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