Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho san hoc snippets" » "cho can hoc snippets", "ho san hoc snippets", "cho sinh hoc snippets", "cho van hoc snippets", "cho dan hoc snippets", "cho san ho 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 san 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: (((("cho san hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho san hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho san hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.