Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chieu tro ho snippets" » "chi tro ho snippets", "chieu cao ho snippets", "chieu gio ho snippets", "chieu trao ho snippets", "chieu tao ho snippets", "chieu tho ho 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: (((("chieu tro ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chieu tro ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chieu tro ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chieu tro ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.