Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
cau thuc » cau truc, cuu thuc, can thuc
hieu ke » hieu kem, chieu ke, hieu ky
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
so sach » bo sach, co sach, hoc sach
cai hoi » dai hoi, cai hoa, lai hoi
so sanh » do sanh
ke cau » ket cau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (so sanh)) ky nang ((cai hoi) or (cau hoi)). hieu ke cau thuc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky nang ((cai hoi) OR (cau hoi)). hieu ke cau thuc va hanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ky nang ((cai hoi) or (cau hoi)). hieu ke cau thuc va hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ky nang ((cai hoi) or (cau hoi)). hieu ke cau thuc va hanh lai cua te*.