Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
nang cai » nang cao, nang tai, nang cap
su sach » so sach
va cham » va chat, va tham
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
cai hoi » cau hoi, dai hoi, cai hoa
vu sach » vu bach, vu khach
luc va » duc va, tuc va, loc va
va cam » va cac, va cao, va cai

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) or (vu sach)) ky nang cai hoi. hieu ((va cam) or (va cham)) luc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang cai hoi. hieu ((va cam) OR (va cham)) luc va hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang cai hoi. hieu ((va cam) or (va cham)) luc va hanh lai cua tre*.