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