Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"coc day nghe snippets" » "coc dang nghe snippets", "coc van nghe snippets", "coc nam nghe snippets", "coc dat nghe snippets", "con day nghe snippets", "hoc day nghe 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: (((("coc day nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("coc day nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( coc day nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("coc day nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.