Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc dam cho snippets" » "duc dai cho snippets", "duc nam cho snippets", "duc dao cho snippets", "duc dam choi snippets", "duc dac cho snippets", "duc day cho 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 dam cho 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 dam cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc dam cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc dam cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.