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