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