Perhaps you should try some spelling variations:
"dung sinh java snippets" » "duong sinh java snippets", "dang sinh java snippets", "dung ninh java snippets", "dung trinh java snippets", "dung using java snippets", "dung sinh va snippets"
"luong duc con snippets" » "duong duc con snippets", "luong cuoc con snippets", "luong dich con snippets", "luong duc cong snippets", "luong duc ton snippets", "luong duc cuong 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 sinh java snippets") or ("luong duc con snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung sinh java snippets") OR ("luong duc con snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung sinh java snippets ) or ( luong duc con snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung sinh java snippets") or ("luong duc con snippets"))) or ("locating bug code snippets"))*.