Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc thuat do snippets" » "hoc thuat do snippets", "toc thai do snippets", "thu thuat do snippets", "toc thuat o 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 thuat do 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 thuat do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc thuat do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc thuat do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.