Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don vu hoat snippets" » "don va hoat snippets", "don ve hoat snippets", "don vu hoan snippets", "doan vu hoat snippets", "don vi hoat 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: (((("don vu hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don vu hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don vu hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don vu hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.