Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cuong vo toi snippets" » "luong va toi snippets", "duong va toi snippets", "cong va toi snippets", "cuong vo thi snippets", "cuong co toi snippets", "cuong vi toi 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: (((("cuong vo toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuong vo toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuong vo toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuong vo toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.