Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc khoa can snippets" » "duoc khoa can snippets", "hoc khoa can snippets", "moc khoa can snippets", "doc khoa cam snippets", "doc khoa cap snippets", "doc khoi can 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: (((("doc khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc khoa can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc khoa can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.