Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc quan le snippets" » "hoc dan le snippets", "tac quan le snippets", "hoc phan le snippets", "hoc quang le snippets", "hoc quan ly snippets", "hoc quan li 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 quan le 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 quan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc quan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc quan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.