Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chat cho moi snippets" » "chat co moi snippets", "chat thom moi snippets", "cap cho moi snippets", "chat khoe moi 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 cho moi 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 cho moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chat cho moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chat cho moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.