Perhaps you should try some spelling variations:
"dung tinh cau snippets" » "dang tinh cau snippets", "dung ninh cau snippets", "dung tin cau snippets", "dung trinh cau snippets", "dung tinh cao snippets", "dung sinh cau snippets"
"hang java java snippets" » "hang 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: (((("dung tinh cau snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tinh cau snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tinh cau snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tinh cau snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.