Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"when hoc chu snippets" » "khien hoc chu snippets", "dien hoc chu snippets", "hen ho chu snippets", "when hoc cau snippets", "when hoc cho snippets", "when hoc thuc 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: (((("when hoc chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("when hoc chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( when hoc chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("when hoc chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.