Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc kho cua snippets" » "ton kho cua snippets", "hoc khoa cua snippets", "hoc khoi cua snippets", "toc khi cua snippets", "toc tho cua snippets", "toc thao 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: (((("toc kho 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: (((("toc kho cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc kho cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc kho cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.