Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"le khanh xue snippets" » "le hanh xu snippets", "le chang xue snippets", "le khanh bui snippets", "le thanh xue snippets", "le anh xue snippets", "de thanh xue 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: (((("le khanh xue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("le khanh xue snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( le khanh xue snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("le khanh xue snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.