Perhaps you should try some spelling variations:
"trinh vat code snippets" » "trinh van code snippets", "trinh luat code snippets", "sinh vat code snippets", "trinh rate code snippets", "trinh vat co snippets", "trinh vat de snippets", "trinh vat code slippers"
"dung cua dan snippets" » "dung luan dan snippets", "dung cho dan snippets", "dung cua dang snippets", "dung cua ban snippets", "dung ca dan snippets", "dung cua dan slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("trinh vat code snippets") or ("dung cua dan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh vat code snippets") OR ("dung cua dan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh vat code snippets ) or ( dung cua dan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh vat code snippets") or ("dung cua dan snippets"))) or ("locating bug code snippets"))*.