Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"le cung toan snippets" » "le dung toan snippets", "le cong toan snippets", "le cung tan snippets", "le quang toan snippets", "le trung 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: (((("le cung 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: (((("le cung toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( le cung toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("le cung toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.