Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc tu chon snippets" » "doc tu choi snippets", "doc tu hon snippets", "doc lua chon snippets", "duoc tu chon snippets", "hoc tu chon snippets", "duc 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: (((("doc 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: (((("doc tu chon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc tu chon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc tu chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.