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