Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"zhan cho hoc snippets" » "han cho hoc snippets", "chan cho hoc snippets", "khuan cho hoc snippets", "zhan co hoc snippets", "zhan khoa hoc 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: (((("zhan cho hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("zhan cho hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( zhan cho hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("zhan cho hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.