Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
nang cai » nang cao, nang tai, nang cap
thai cua » than cua, tai cuc, tri cua
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cai hoi » cau hoi, dai hoi, cai hoa
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cao, va cai
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang cai hoi. hieu ((va cam) OR (va cac)) luc va hanh thai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang cai hoi. hieu ((va cam) OR (va cac)) luc va hanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang cai hoi. hieu ((va cam) OR (va cac)) luc va hanh thai cua tre*.