Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hau mach cua snippets" » "hau sach cua snippets", "khau sach cua snippets", "ban mach cua snippets", "hau manh cua snippets", "hau cach cua 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: (((("hau mach cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hau mach cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hau mach cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hau mach cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.