Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho hoc dot snippets" » "co hoc dot snippets", "khoa hoc dot snippets", "cho hoc dat snippets", "cho hoc do snippets", "cho hoc doi 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 hoc dot 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 hoc dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho hoc dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho hoc dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.