Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoe tham do snippets" » "khoe cham do snippets", "khoe thay do snippets", "khoa kham do snippets", "khoe thai do snippets", "khoe pham do snippets", "khoe tham du 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: (((("khoe tham 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: (((("khoe tham do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoe tham do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoe tham do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.