Perhaps you should try some spelling variations:
"nang java java snippets" » "nang va java snippets"
"cong hoa cong snippets" » "dong hoa cong snippets", "dong hoc cong snippets", "hang hoa cong snippets", "cong cua cong snippets", "cong va cong snippets", "cong hoa co 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: (((("nang java java snippets") or ("cong hoa cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang java java snippets") OR ("cong hoa cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang java java snippets ) or ( cong hoa cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang java java snippets") or ("cong hoa cong snippets"))) or ("locating bug code snippets"))*.