Perhaps you should try some spelling variations:
"nham using java snippets" » "nham ung java snippets", "nham using data snippets"
"dung luan cong snippets" » "dung luat cong snippets", "dung luong cong snippets", "dung luan chung 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 luan cong snippets") or ("nham using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luan cong snippets") OR ("nham using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung luan cong snippets ) or ( nham using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luan cong snippets") or ("nham using java snippets"))) or ("locating bug code snippets"))*.