Perhaps you should try some spelling variations:
"tranh luan cac snippets" » "trinh luan cac snippets", "trinh luat cac snippets", "doanh luan cac snippets", "tranh luan dac snippets", "tranh luan tac snippets", "tranh luat cac snippets"
"dung va java snippets" » "dung java 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: (((("tranh luan cac snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tranh luan cac snippets") OR ("dung va java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tranh luan cac snippets ) or ( dung va java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tranh luan cac snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))*.