Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc ban tong snippets" » "hoc ban trong snippets", "hoc ban tuong snippets", "hoc ban thong snippets", "hoc bang tong snippets", "hoc dan tong snippets", "hoc bai tong 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: (((("hoc ban tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc ban tong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc ban tong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc ban tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.