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