Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu cua toi snippets" » "thuc cua toi snippets", "hu cua toi snippets", "tu cua toi snippets", "thu cua hoi snippets", "thu cua moi snippets", "thu cua loai 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 cua toi 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 cua toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu cua toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu cua toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.