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