Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"hoc dao hieu snippets" » "hoc cao hieu snippets", "hoc van hieu snippets", "hoc bao hiem snippets", "hoc dan hieu snippets", "hoc dai hieu snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hoc dao hieu snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"hoc dao hieu snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( hoc dao hieu snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dao hieu snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.