Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho mot toan snippets" » "cho mon toan snippets", "cho mot thanh snippets", "cho mot doanh snippets", "cho moi 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: (((("cho mot 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: (((("cho mot toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho mot toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho mot toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.