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