Perhaps you should try some spelling variations:
"nang cao code snippets" » "nang cao cong snippets", "nang cao de snippets", "nang cfd code snippets", "nang cao code slippers"
"nphang java java snippets" » "nphang java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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 cao code snippets") or ("nphang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang cao code snippets") OR ("nphang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang cao code snippets ) or ( nphang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang cao code snippets") or ("nphang java java snippets"))) or ("locating bug code snippets"))*.