Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc dong cao snippets" » "hoc duong cao snippets", "hoc cong cao snippets", "hoc dung cao snippets", "hoc dong co snippets", "hoc dong cho 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 dong cao 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 dong cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc dong cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dong cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.