Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chep khoa de snippets" » "che khoa de snippets", "hop khoa de snippets", "chua khoa de snippets", "chep khoa dr snippets", "chep khoa he snippets", "chep khoi de 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: (((("chep khoa de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chep khoa de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chep khoa de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chep khoa de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.