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