Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lich hang du snippets" » "lich han du snippets", "lich khong du snippets", "minh hang du snippets", "lich hang dau snippets", "lich hoang du snippets", "lich nang du 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: (((("lich hang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lich hang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lich hang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lich hang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.