Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"theo tu cao snippets" » "theo tieu cao snippets", "theo chu cao snippets", "theo yeu cao snippets", "theo cu cao snippets", "theo tu cac snippets", "theo vu cao 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: (((("theo tu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("theo tu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( theo tu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("theo tu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.