Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mong hoc do snippets" » "dong hoc do snippets", "mon hoc do snippets", "mang hoc do snippets", "mong hoc doi snippets", "mong hoc co snippets", "mong hoc bo 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: (((("mong hoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mong hoc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mong hoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mong hoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.