Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc khoi can snippets" » "hoc khoi can snippets", "buoc khoi can snippets", "cuoc khoi can snippets", "doc khoa can snippets", "doc khoi nang snippets", "doc hoc 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 khoi 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 khoi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc khoi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc khoi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.