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