Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cac hieu cua snippets" » "cac hieu code snippets", "cac chieu cua snippets", "cao hieu cua snippets", "cac kieu cua snippets", "cac hieu qua snippets", "cac dieu cua snippets", "cac bieu cua 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: (((("cac hieu cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac hieu cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cac hieu cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac hieu cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.