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