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