Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son mang hoc snippets" » "son tang hoc snippets", "son quang hoc snippets", "song hang hoc snippets", "son nang hoc snippets", "son bang hoc snippets", "son mang loc 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: (((("son mang hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son mang hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son mang hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son mang hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.