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