Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua cham voi snippets" » "qua hai voi snippets", "qua cac voi snippets", "va cham voi snippets", "qua cham hoi snippets", "qua pham voi snippets", "qua 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: (((("qua 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: (((("qua cham voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua cham voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua cham voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.