Perhaps you should try some spelling variations:
"tinh toan code snippets" » "tinh toan co snippets", "tinh toan cong snippets", "tinh toan de snippets", "trinh toan code snippets", "dinh toan code snippets", "minh toan code snippets"
"hang java java snippets" » "hang va java snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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 code snippets") or ("hang java java snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tinh toan code snippets") OR ("hang java java snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( tinh toan code snippets ) or ( hang java java snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("tinh toan code snippets") or ("hang java java snippets"))) or ("locating bug code slippers"))*.