Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi sach che snippets" » "thi bach che snippets", "thu sach che snippets", "theo sach che snippets", "thi sach thue snippets", "thi sach nha snippets", "thi sach cap 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: (((("thi sach che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi sach che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi sach che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi sach che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.