Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hang phe snippets" » "thi hang phe snippets", "thuc hanh phe snippets", "thu huong phe snippets", "thu hoang phe snippets", "thu hang phat snippets", "thu hang pham 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 phe 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 phe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hang phe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hang phe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.