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