Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu danh co snippets" » "thu canh co snippets", "thu anh co snippets", "thu dang co snippets", "thu danh cho snippets", "thu doanh co 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 danh co 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 danh co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu danh co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu danh co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.