Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc kinh he snippets" » "hoc sinh he snippets", "luoc kinh he snippets", "hoc kinh te snippets", "hoc hinh he snippets", "hoc kinh ve 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 kinh 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 kinh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc kinh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc kinh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.