Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuy vu do snippets" » "thu vu do snippets", "thuy hu do snippets", "thuy luc do snippets", "thuy vu dao snippets", "thuy va do snippets", "thuy tu do 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: (((("thuy vu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuy vu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuy vu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuy vu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.