Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho hang den snippets" » "cho thanh den snippets", "cho phan den snippets", "thi hang den snippets", "cho hang dien snippets", "cho hang ben snippets", "cho huong den 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: (((("cho hang den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho hang den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho hang den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho hang den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.