Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac luat moi snippets" » "cap luat moi snippets", "cac xuat moi snippets", "cac thuat moi snippets", "cac luat hoi snippets", "cac luat so snippets", "cac luat dai 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: (((("cac luat moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac luat moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac luat moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac luat moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.