Perhaps you should try some spelling variations:
"trinh quoc lieu snippets" » "trinh quan lieu snippets", "chinh quoc lieu snippets", "trinh doc lieu snippets", "trinh duoc lieu snippets", "trinh quoc sieu snippets", "trinh quoc viet snippets", "trinh quoc lieu slippers"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets", "dung cac 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 quoc lieu snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh quoc lieu snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh quoc lieu snippets ) or ( dung cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh quoc lieu snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))*.