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