Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh ca loc snippets" » "dan ca loc snippets", "doanh cua loc snippets", "danh cho loc snippets", "danh cua loc snippets", "danh chua loc 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: (((("danh ca loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh ca loc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh ca loc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh ca loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.