Perhaps you should try some spelling variations:
"dong luc cac snippets" » "nang luc cac snippets", "dong luoc cac snippets", "dong tuc cac snippets", "dong duc cac snippets"
"dung vbugs code snippets" » "dung vbungs code snippets", "dung vbugss code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong luc cac snippets") or ("dung vbugs code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong luc cac snippets") OR ("dung vbugs code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong luc cac snippets ) or ( dung vbugs code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luc cac snippets") or ("dung vbugs code snippets"))) or ("locating bug code snippets"))*.