Perhaps you should try some spelling variations:
"dong trinh nhap snippets" » "cong trinh nhap snippets", "dong tinh nhap snippets", "dong tranh nhap snippets", "dong trinh nha snippets", "dong trinh phap snippets", "dong trinh han snippets", "dong trinh nhap slippers"
"using _ code snippets" » "using _ 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: (((("using _ code snippets") or ("dong trinh nhap snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using _ code snippets") OR ("dong trinh nhap snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using _ code snippets ) or ( dong trinh nhap snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using _ code snippets") or ("dong trinh nhap snippets"))) or ("locating bug code snippets"))*.