Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mot cong doc snippets" » "moi cong doc snippets", "hoc cong doc snippets", "bo cong doc snippets", "mot chong doc snippets", "mot cong coc snippets", "mot cong dac 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: (((("mot cong doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mot cong doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mot cong doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mot cong doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.