Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"de hieu doi snippets" » "de hieu moi snippets", "de hieu loi snippets", "de hieu voi snippets", "doc hieu doi snippets", "dao hieu doi snippets", "dat hieu doi 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: (((("de hieu doi snippets") or ("python using java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("de hieu doi snippets") OR ("python using java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( de hieu doi snippets ) or ( python using java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("de hieu doi snippets") or ("python using java snippets"))) or ("locating bugs code snippets"))*.