Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu canh so snippets" » "thuc hanh so snippets", "thu cong so snippets", "thu ban so snippets", "thu anh so snippets", "thu chinh so snippets", "thu canh sat 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 canh 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: (((("thu canh so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu canh so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu canh so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.