Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khong he doi snippets" » "khong khi doi snippets", "hong ha doi snippets", "khong _ doi snippets", "khong he dai snippets", "khong te doi snippets", "khong he 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: (((("khong he doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khong he doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khong he doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khong he doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.