Perhaps you should try some spelling variations:
"trinh viet co snippets" » "ninh viet co snippets", "trinh vat co snippets", "trinh viet o snippets"
"dang bac code snippets" » "dong bac code snippets", "bang bac code snippets", "dan bac 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: (((("trinh viet co snippets") or ("dang bac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh viet co snippets") OR ("dang bac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh viet co snippets ) or ( dang bac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh viet co snippets") or ("dang bac code snippets"))) or ("locating bug code snippets"))*.