Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu dieu hoi snippets" » "thuat dieu hoi snippets", "thu hien hoi snippets", "he dieu hoi snippets", "thu dieu hoa snippets", "thu dieu moi snippets", "thu dieu tuoi 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: (((("thu dieu 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: (((("thu dieu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu dieu hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu dieu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.