Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoe ma cham snippets" » "khoa ma cham snippets", "khoe va cham snippets", "khoe moi cham snippets", "khoe ca cham snippets", "khoe gia cham 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 ma cham 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 ma cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoe ma cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoe ma cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.