Perhaps you should try some spelling variations:
"trinh doanh duoc snippets" » "trinh danh duoc snippets", "kinh doanh duoc snippets", "chinh doanh duoc snippets", "trinh doanh cuoc snippets", "trinh doanh quoc snippets", "trinh dong duoc snippets", "trinh doanh duoc 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 doanh duoc 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 doanh duoc snippets") OR ("dung cho code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh doanh duoc snippets ) or ( dung cho code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh doanh duoc snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))*.