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