Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc cuong le snippets" » "hoc chuong le snippets", "hoc cong le snippets", "hoc luong le snippets", "hoc vuong le snippets", "hoc cuong ve snippets", "hoc duong le 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 cuong le 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 cuong le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc cuong le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc cuong le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.