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