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