Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"le khanh doc snippets" » "le nhanh doc snippets", "le khanh quoc snippets", "le khanh hoa snippets", "le thanh doc snippets", "le anh doc snippets", "de thanh doc 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 doc 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 doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( le khanh doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("le khanh doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.