Perhaps you should try some spelling variations:
"cong nhat code snippets" » "cong nhat de snippets", "cong nhat co snippets", "cong nhan code snippets", "cong ha code snippets", "cong suat code snippets", "cong nhat code 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: (((("dung cho code snippets") or ("cong nhat code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cho code snippets") OR ("cong nhat code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cho code snippets ) or ( cong nhat code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cho code snippets") or ("cong nhat code snippets"))) or ("locating bug code snippets"))*.