Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri sach cap snippets" » "troi sach cap snippets", "tri khach cap snippets", "trom sach cap snippets", "tri sach dao snippets", "tri sach bai snippets", "tri sach xa 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: (((("tri sach cap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri sach cap snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri sach cap snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri sach cap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.