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