Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi cao so snippets" » "thai cao so snippets", "thi hao so snippets", "thi bao so snippets", "thi cao son snippets", "thi co so snippets", "thi cao su 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: (((("thi cao 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: (((("thi cao so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi cao so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.