Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua lap toan snippets" » "qua tap toan snippets", "qua lap doanh snippets", "qua phap toan snippets", "quan lap toan snippets", "qua ap toan snippets", "qua la toan 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: (((("qua lap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qua lap toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua lap toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua lap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.