Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van linh dat slippers" » "van minh dat slippers", "van dinh dat slippers", "van binh dat slippers", "van linh dan slippers", "van linh hoat slippers", "van linh dat slippery", "van linh dat grippers"
"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 linh dat slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van linh dat slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van linh dat slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van linh dat slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.