Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thpt can chi snippets" » "thpt dan chi snippets", "thpt con chi snippets", "thpt tran chi snippets", "thpt can thi snippets", "thpt van chi snippets", "thpt san chi 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: (((("thpt can chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thpt can chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thpt can chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thpt can chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.