Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu tuan he snippets" » "chu tuan he snippets", "thu trang he snippets", "thu thuat he snippets", "thu quan he snippets", "thu tuan le snippets", "thu toan 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 tuan 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 tuan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu tuan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu tuan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.