Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc luat hoi snippets" » "duoc luat hoi snippets", "duc duat hoi snippets", "dung luat hoi snippets", "duc luat moi snippets", "duc luat so snippets", "duc luat dai 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: (((("duc luat hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc luat hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc luat hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc luat hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.