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