Perhaps you should try some spelling variations:
"ban nguoi cong snippets" » "ban nguoi muong snippets", "ban nguoi thong snippets", "ban nguoi nung snippets", "ban nuoi cong snippets", "ran nguoi cong snippets", "gian nguoi cong snippets"
"dung java java snippets" » "dung va java 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: (((("ban nguoi cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban nguoi cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban nguoi cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban nguoi cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.