Perhaps you should try some spelling variations:
"cuon sach nuoc snippets" » "duong sach nuoc snippets", "cuoc cach nuoc snippets", "co sach nuoc snippets", "cuon sach duoc snippets", "cuon cac nuoc snippets", "cuon bach tuoc snippets", "cuon sach nuoc slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("cuon sach nuoc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuon sach nuoc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuon sach nuoc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuon sach nuoc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.