Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tro cau hoc snippets" » "tao cau hoc snippets", "tra cau hoc snippets", "tro cap hoc snippets", "tro cau hoi snippets", "tro cau hoa snippets", "tro cao hoc 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: (((("tro cau hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tro cau hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tro cau hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tro cau hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.