Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lam hoc te snippets" » "am hoc te snippets", "lam hoa te snippets", "tam hoc te snippets", "lam hoc tu snippets", "lam hoc he 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: (((("lam hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lam hoc te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lam hoc te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lam hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.