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