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