Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"theo doi cac snippets" » "theo duoi cac snippets", "theo don cac snippets", "theo dong cac snippets", "theo doi cach snippets", "theo voi cac snippets", "theo do cac 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 doi cac 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 doi cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( theo doi cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("theo doi cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.