Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sieu van hoc snippets" » "hieu van hoc snippets", "su van hoc snippets", "lieu va hoc snippets", "sieu van hoa 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: (((("sieu van 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: (((("sieu van hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sieu van hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sieu van hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.