Perhaps you should try some spelling variations:
"cong tan tu snippets" » "cong tac tu snippets", "cong san tu snippets", "cong thanh tu snippets", "cong tran tu snippets", "cong toan tu snippets", "cong tang tu snippets", "cong tan tu 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 tan tu 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 tan tu snippets") OR ("dung va java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tan tu snippets ) or ( dung va java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tan tu snippets") or ("dung va java snippets"))) or ("locating bug code snippets"))*.