Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bach dan cau snippets" » "bach dang cau snippets", "bac dan cau snippets", "bach van cau snippets", "bach danh cau snippets", "bach dan ca snippets", "bach dat cau 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 dan cau 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 dan cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bach dan cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bach dan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.