Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van quy cac snippets" » "van duy cac snippets", "van quan cac snippets", "van quy tac snippets", "van qua cac snippets", "van quy chau 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 quy cac 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 quy cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van quy cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van quy cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.