Perhaps you should try some spelling variations:
"cong dot thuc snippets" » "cong mot thuc snippets", "cong dong thuc snippets", "cong doan thuc snippets", "cong do thuc snippets", "cong doc thuc snippets", "cong dot 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 dot 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 dot thuc snippets") OR ("dung va java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dot thuc snippets ) or ( dung va java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dot thuc snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))*.