Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"de hieu loi snippets" » "de hieu moi snippets", "de hien loi snippets", "de hieu voi snippets", "doc hieu loi snippets", "dao hieu loi snippets", "dat hieu 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: (((("de hieu loi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("de hieu loi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( de hieu loi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("de hieu loi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.