Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa tri hoi snippets" » "khoa tai hoi snippets", "khoa tre hoi snippets", "khoan tai hoi snippets", "khoa tri hoc snippets", "khoa tri doi snippets", "khoa tri moi 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: (((("khoa tri hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa tri hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tri hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tri hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.