Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"long dac cho snippets" » "cong dac cho snippets", "tong dac cho snippets", "luong dao cho snippets", "long day cho snippets", "long danh 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: (((("long dac 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: (((("long dac cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( long dac cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("long dac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.