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