Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat luu toan snippets" » "hat cuu toan snippets", "hat huu toan snippets", "hat luu tuan snippets", "chat huu toan snippets", "chat lua toan snippets", "phap luu toan 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: (((("hat luu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat luu toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat luu toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat luu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.