Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho hon don snippets" » "cho hoc don snippets", "cho lon don snippets", "cao hon don snippets", "cho hoa don snippets", "cho hon loan snippets", "cho hong son 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: (((("cho hon don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho hon don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho hon don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho hon don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.