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