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