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