Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat dan cau snippets" » "hat van cau snippets", "mat dan cau snippets", "nhat danh cau snippets", "hat danh cau snippets", "hat dan ca snippets", "hat dat cau 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: (((("hat dan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat dan cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat dan cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat dan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.