Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua ham do snippets" » "cua tam do snippets", "cua nam do snippets", "cua am do snippets", "cua pham do snippets", "cua tham do snippets", "cua ham so 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 ham do 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 ham do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua ham do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua ham do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.