Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi tu chon snippets" » "doi tu choi snippets", "doi tu hon snippets", "doi lua chon snippets", "doi thu chon snippets", "loi tu chon snippets", "hoi tu chon 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: (((("doi tu chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi tu chon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi tu chon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi tu chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.