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