Perhaps you should try some spelling variations:
"cau hoc cach snippets" » "cau hoc code snippets", "cau hoc cac snippets", "cau hoc sach snippets", "cau cuoc cach snippets", "cau hoi cach snippets", "cau hoa cach snippets", "cao hoc cach snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using low snippets" » "python using code 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: (((("python using low snippets") or ("cau hoc cach snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using low snippets") OR ("cau hoc cach snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using low snippets ) or ( cau hoc cach snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using low snippets") or ("cau hoc cach snippets"))) or ("locating bug core snippets"))*.