Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hieu mot cac snippets" » "hieu mot code snippets", "thieu mot cac snippets", "hieu moi cac snippets", "hieu so cac snippets", "hieu mot cach snippets", "hieu mo cac snippets", "hieu mot bac 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: (((("hieu mot cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu mot cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hieu mot cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu mot cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.