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