Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sinh kiem o2 snippets" » "trinh kiem o2 snippets", "binh khiem o2 snippets", "sinh vien o2 snippets", "sinh kiem mon snippets", "sinh kiem mot 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: (((("sinh kiem o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sinh kiem o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sinh kiem o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sinh kiem o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.