Perhaps you should try some spelling variations:
"hieu trien o snippets" » "hieu tren o snippets", "hieu triet o snippets", "hieu truyen o snippets", "hieu trien bao snippets", "hieu trien cho snippets", "hieu trien ton snippets"
"python using java snippets" » "python using data 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: (((("hieu trien o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu trien o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu trien o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu trien o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.