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