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