Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"toc trieu do snippets" » "toc trieu code snippets", "toc thieu do snippets", "hoc thieu do snippets", "hoc tieu do snippets", "toc trien do snippets", "toc trieu dai snippets", "toc trien dot snippets"
"python using java snippets" » "python using data 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: (((("toc trieu do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc trieu do snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( toc trieu do snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc trieu do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.