Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc tien do snippets" » "luc tieng do snippets", "luc thien do snippets", "duc tien do snippets", "luc tien bo snippets", "luc bien do snippets", "luc tien dong 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: (((("luc tien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc tien do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc tien do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc tien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.