Perhaps you should try some spelling variations:
cach nhanh » cac nganh, cac nhan, cac thanh
thuc cach » thuoc sach, truoc cach, thuc hanh
cau thuc » cau truc, cuu thuc, can thuc
nang tai » hang tai, tang tai, sang tai
nhanh di » nhanh vi, nhanh li, nhanh dien
hieu van » thien van, hieu ve
so hanh » so sanh, so danh, co hanh
cua tuc » cua duc, cua tu, cua thuoc
hanh ky » hanh kem
hieu va » hieu qua
tai hoi » tai khoi, dai hoi, tai hai
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so hanh ky nang tai hoi. ((((hieu van) or (hieu va))) or (lieu va)) cau thuc cach nhanh di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so hanh ky nang tai hoi. ((((hieu van) OR (hieu va))) OR (lieu va)) cau thuc cach nhanh di cua tuc.
• Adding a wildcard symbol may retrieve word variants: so hanh ky nang tai hoi. ((((hieu van) or (hieu va))) or (lieu va)) cau thuc cach nhanh di cua tuc*.