Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pho hoc te snippets" » "phoi hoc te snippets", "cho hoc te snippets", "pho ho te snippets", "pho hoc tu snippets", "pho 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: (((("pho 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: (((("pho hoc te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pho hoc te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pho hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.