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