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