Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hang dem snippets" » "thi hang dem snippets", "thuc hanh dem snippets", "thu huong dem snippets", "thu hang dam snippets", "thu hang dien snippets", "thu chang dam 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: (((("thu hang dem snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hang dem snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hang dem snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hang dem snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.