Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach bai voi snippets" » "sach dao voi snippets", "cac bai voi snippets", "sach xa voi snippets", "sach ba voi snippets", "sach ban voi snippets", "sach bai choi 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: (((("sach bai 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: (((("sach bai voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach bai voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach bai voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.