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