Perhaps you should try some spelling variations:
"thoan tran cac snippets" » "hoan tran cac snippets", "toan tran cac snippets", "tan tran cac snippets", "thoan tranh cac snippets", "thoan tran chau snippets", "thoan tran mach 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: (((("thoan tran 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: (((("thoan tran cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thoan tran cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thoan tran cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.