Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chat vu cua snippets" » "chat va cua snippets", "nhat vu cua snippets", "chat vo cua snippets", "chat hu cua snippets", "chat tu 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: (((("chat 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: (((("chat vu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chat vu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chat vu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.