Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hoi nghe snippets" » "thu hoi nghi snippets", "thu hoc nghe snippets", "thu hoa nghe snippets", "thu hoai nghe snippets", "thu phoi nghe snippets", "thu hai nghe 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 hoi nghe 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 hoi nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hoi nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hoi nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.