Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan cham voi snippets" » "gian cham voi snippets", "luan chat voi snippets", "lang chai voi snippets", "lan cham hoi snippets", "lan pham voi snippets", "lan cham soc 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: (((("lan cham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan cham voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan cham voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan cham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.