Perhaps you should try some spelling variations:
"dan truoc cach snippets" » "dan cuoc cach snippets", "dan thuc cach snippets", "dan truoc cang snippets", "dang thuoc cach snippets", "gian truoc cach snippets", "dan toc 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: (((("dan truoc 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: (((("dan truoc cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan truoc cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan truoc cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.