Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan truc so snippets" » "doan trung so snippets", "xuan truc so snippets", "doan tru so snippets", "doan thuc so snippets", "doan truc 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: (((("doan truc so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan truc so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan truc so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan truc so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.