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