Perhaps you should try some spelling variations:
nhanh hoi » nhanh hai, nhanh hon, nhanh hoan
va nhanh » va thanh, va hanh, va nhan
te sach » toc sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cau duc » cao duc, cau luc, chu duc
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((mai hoi) or (dai hoc)). hieu va cau duc va nhanh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((mai hoi) OR (dai hoc)). hieu va cau duc va nhanh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((mai hoi) or (dai hoc)). hieu va cau duc va nhanh hoi cua tre*.