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