Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chan va toan snippets" » "chuan va toan snippets", "nhan va toan snippets", "chat va toan snippets", "chan van toan snippets", "chan bai toan snippets", "chan tap toan 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: (((("chan va toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chan va toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chan va toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chan va toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.