Perhaps you should try some spelling variations:
"dung vat de snippets" » "dung va de snippets", "dong vat de snippets", "dung dat de snippets", "dung vat da snippets", "dung vat dien snippets"
"cuong vo code snippets" » "luong va code snippets", "duong va code snippets", "cong va code snippets", "cuong vo core snippets"
"locating bug code snippets" » "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 vat de snippets") or ("cuong vo code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vat de snippets") OR ("cuong vo code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vat de snippets ) or ( cuong vo code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vat de snippets") or ("cuong vo code snippets"))) or ("locating bug code snippets"))*.