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