Perhaps you should try some spelling variations:
"sinh thuc cach snippets" » "trinh thuc cach snippets", "sinh hoc cach snippets", "sinh thai cach snippets", "sinh thuoc sach snippets", "sinh truoc cach snippets", "sinh thuc hanh 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: (((("sinh 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: (((("sinh thuc cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sinh thuc cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sinh thuc cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.