Perhaps you should try some spelling variations:
"duong dung code snippets" » "cuong dung code snippets", "dung dung code snippets", "duong dang code snippets", "duong dung cong snippets", "duong dung co snippets", "duong dung de snippets", "duong dung code slippers"
"va trinh java snippets" » "van trinh java snippets", "va tinh java snippets", "lap trinh java snippets", "va trinh java 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: (((("va trinh java snippets") or ("duong dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va trinh java snippets") OR ("duong dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va trinh java snippets ) or ( duong dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va trinh java snippets") or ("duong dung code snippets"))) or ("locating bug code snippets"))*.