Perhaps you should try some spelling variations:
"anh thuc cach snippets" » "anh thuoc sach snippets", "anh truoc cach snippets", "anh thuc hanh snippets", "am thuc cach snippets", "dan thuc cach snippets", "anh tu cach 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: (((("anh thuc cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh thuc cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh thuc cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh thuc cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.