Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham dan cho snippets" » "nam dan cho snippets", "hat dan cho snippets", "hai dan cho snippets", "ham danh cho snippets", "ham san cho snippets", "ham 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: (((("ham 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: (((("ham dan cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham dan cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham dan cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.