Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao manh so snippets" » "dao hanh so snippets", "dao minh so snippets", "day manh so snippets", "dao anh so snippets", "dao mach so snippets", "dao manh ho 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: (((("dao manh 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: (((("dao manh so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao manh so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao manh so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.