Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cai hoi » dai hoi, cai hoa, lai hoi
hieu ke » hieu kem, chieu ke, hieu ky
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
ke cau » ket cau
luc va » duc va, tuc va, loc va
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: su sach ky nang ((cai hoi) or (cau hoi)). hieu ke cau luc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((cai hoi) OR (cau hoi)). hieu ke cau luc va hanh hai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((cai hoi) or (cau hoi)). hieu ke cau luc va hanh hai cua te*.