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