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