Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day manh son snippets" » "van manh son snippets", "duc manh son snippets", "ha manh son snippets", "day anh son snippets", "day minh son snippets", "day manh hon 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: (((("day manh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("day manh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day manh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day manh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.