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