Perhaps you should try some spelling variations:
"tinh toan data snippets" » "tinh toan dam snippets", "tinh toan dai snippets", "tinh tan dat snippets", "trinh toan data snippets", "dinh toan data snippets", "minh toan data snippets", "tinh toan data slippers"
"dung java java snippets" » "dung va java snippets", "dung java 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: (((("tinh toan data snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tinh toan data snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tinh toan data snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tinh toan data snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.