Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len tap toan snippets" » "len tap doan snippets", "len tap quan snippets", "len bai toan snippets", "len tac toan snippets", "luyen tap toan snippets", "bien 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: (((("len tap 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: (((("len tap toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len tap toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len tap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.