Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho giac do snippets" » "cho giao do snippets", "cho gia do snippets", "co giac do snippets", "cho giac mo snippets", "cho giac duoc 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 giac 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: (((("cho giac do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho giac do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho giac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.