Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh va, dinh lam
cham duc » pham duc, cham soc, pham duy
su sach » so sach, vu sach
va cham » va chat, va tham
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
tay hoi » tay ho, tao hoi, tay thai
may hoi » may thoi, mai hoi, may hmi
ty mang » ty xang, ty hang, tin mang
cua tre » cua te, cuu tre, cua triet

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