Perhaps you should try some spelling variations:
"thi can nghe snippets" » "thi can code snippets", "thi van nghe snippets", "thi cap nghe snippets", "thi cac nghe snippets", "thi canh nghe snippets", "thi lan nghe snippets", "thi dan nghe 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 ("thi can nghe snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("thi can nghe snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( thi can nghe snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("thi can nghe snippets"))) or ("locating bug core snippets"))*.