Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoi thanh do snippets" » "hoc thanh do snippets", "hai thanh do snippets", "hoa thanh do snippets", "hoi thanh pho snippets", "hoi thanh hoa snippets", "hoi thanh loi 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: (((("hoi thanh 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: (((("hoi thanh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoi thanh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoi thanh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.