Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
cau tuc » cau truc, cau tu, cau luc
lai cua » dai cua, hai cua, lai chau
sach ty » sach y, sach tu, sach thu
cai hoi » dai hoi, cai hoa, lai hoi
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach kem
hieu ke » hieu kem, chieu ke, hieu ky
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
ke cau » ket cau

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