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