Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van gian hoi snippets" » "van giang hoi snippets", "dan gian hoi snippets", "van giao hoi snippets", "van gian thai snippets", "van gian ha snippets", "van gian o 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 gian hoi 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 gian hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van gian hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van gian hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.