Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sac dan cho snippets" » "cac dan cho snippets", "bac dan cho snippets", "sa dan cho snippets", "sac danh cho snippets", "sac san cho snippets", "sac dac cho 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: (((("sac dan cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sac dan cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sac dan cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sac dan cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.