Perhaps you should try some spelling variations:
"thanh toan cao snippets" » "thanh hoa cao snippets", "thanh san cao snippets", "tinh toan cao snippets", "thanh toan ban snippets", "thanh toan tap 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: (((("thanh toan cao snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thanh toan cao snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thanh toan cao snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thanh toan cao snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.