Perhaps you should try some spelling variations:
"dung luan duc snippets" » "dung xuan duc snippets", "dung luan dac snippets", "dung luan thuc snippets", "dung luan duc slippers"
"dung vbugss code snippets" » "dung vbugss code slippers", "dung vbugss core snippets", "dung vbungss code snippets", "dung vbugsss code snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "locating bung code snippets", "locating bugs code 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 luan duc snippets") or ("dung vbugss code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luan duc snippets") OR ("dung vbugss code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung luan duc snippets ) or ( dung vbugss code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luan duc snippets") or ("dung vbugss code snippets"))) or ("locating bug code snippets"))*.