Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"don hien du snippets" » "don hien code snippets", "dong hien du snippets", "den hien du snippets", "doi hien du snippets", "don hien tu snippets", "don hien dai snippets", "don khien tu snippets"
"python using java snippets" » "python using data 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 hien du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don hien du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( don hien du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don hien du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.