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