Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van luoc ve snippets" » "van loc ve snippets", "van luc ve snippets", "van duoc ve snippets", "van nuoc ve snippets", "van luoc va snippets", "van luoc vu 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 luoc 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 luoc ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van luoc ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van luoc ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.