Perhaps you should try some spelling variations:
"nhan thuc co snippets" » "nhan luc co snippets", "dan thuc co snippets", "toan thuc co snippets", "nhan tuc co snippets", "nhan thuat co snippets", "nhan thuc cua 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: (((("nhan thuc co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan thuc co snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan thuc co snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan thuc co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.