Perhaps you should try some spelling variations:
nang lai » nang tai, nang cai, nang hai
mang lai » mang luoi, dang loai, trang lai
mang lam » bang lam, mang mam, nang lam
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
di cua » dai cua, doi cua, de cua

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 lai) or (((mang lai) OR (mang lam)))) hoi. hieu ve cam duc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang lai) OR (((mang lai) OR (mang lam)))) hoi. hieu ve cam duc va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang lai) or (((mang lai) OR (mang lam)))) hoi. hieu ve cam duc va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang lai) or (((mang lai) OR (mang lam)))) hoi. hieu ve cam duc va hanh di cua tre*.