Perhaps you should try some spelling variations:
"cong dan thuc snippets" » "cong san thuc snippets", "cong tan thuc snippets", "huong dan thuc snippets", "cong dan toc snippets", "cong am thuc snippets", "cong dan thuc slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("cong dan thuc snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dan thuc snippets") OR ("dung va java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dan thuc snippets ) or ( dung va java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dan thuc snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))*.