Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ke binh hoc snippets" » "ke sinh hoc snippets", "ke benh hoc snippets", "ke hinh hoc snippets", "ke tinh hoc snippets", "phe binh 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: (((("ke binh 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: (((("ke binh hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ke binh hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ke binh hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.