Perhaps you should try some spelling variations:
"dong ngu va snippets" » "song ngu va snippets", "dong ngo va snippets", "cong ngu va snippets", "dong ngu van snippets", "dong ngu ca snippets", "dong nguoi va snippets"
"dung cac cong snippets" » "luong cac cong snippets", "dung cho cong snippets", "dung tai cong snippets", "dung cua cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dong ngu va snippets") or ("dung cac cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong ngu va snippets") OR ("dung cac cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong ngu va snippets ) or ( dung cac cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong ngu va snippets") or ("dung cac cong snippets"))) or ("locating bug code snippets"))*.