Perhaps you should try some spelling variations:
"cong nhat co snippets" » "cong nhan co snippets", "cong ha co snippets", "cong suat co snippets", "cong nhat cho snippets", "cong nhat so snippets", "cong chat co snippets"
"anh java java snippets" » "anh 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: (((("anh java java snippets") or ("cong nhat co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh java java snippets") OR ("cong nhat co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh java java snippets ) or ( cong nhat co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh java java snippets") or ("cong nhat co snippets"))) or ("locating bug code snippets"))*.