Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hao van doi snippets" » "dao van doi snippets", "ho van doi snippets", "cao van doi snippets", "hao van loi snippets", "hao van noi snippets", "hao van do 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: (((("hao van doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hao van doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hao van doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hao van doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.