Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"shan lu toan snippets" » "shan li toan snippets", "nhan luc toan snippets", "than luc toan snippets", "shan le toan snippets", "shan ly toan snippets", "shan duc 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: (((("shan lu 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: (((("shan lu toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( shan lu toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("shan lu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.