Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luoc viet ca snippets" » "nuoc viet ca snippets", "quoc viet ca snippets", "duoc viet ca snippets", "luoc viet ha snippets", "luoc viet co snippets", "luoc viet a 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: (((("luoc viet ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luoc viet ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luoc viet ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luoc viet ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.