Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"down hoc vi snippets" » "toan hoc vi snippets", "dong hoc vi snippets", "mon hoc vi snippets", "down hoc va snippets", "down hoc viet snippets", "down hoc vi slippers"
"locating bug code snippets" » "locating bug code slippers", "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 vi 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 vi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( down hoc vi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("down hoc vi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.