Perhaps you should try some spelling variations:
thanh ca » thanh cha, thanh cac, thanh ha
va thanh » gia thanh, ban thanh, va tinh
lam duoc » nam duoc, luat duoc, lam thuoc
sach ky » sac ky, sach y, sach kem
duoc va » nuoc va, duc va, duoc ma
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
ma hoi » mai hoi, xa hoi, me hoi
va lam » van lam, va lap
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach ky) OR (sach ty)) nang ((ma hoi) or (ma hoa)). lieu va lam duoc va thanh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach ty)) nang ((ma hoi) OR (ma hoa)). lieu va lam duoc va thanh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach ty)) nang ((ma hoi) or (ma hoa)). lieu va lam duoc va thanh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sach ty)) nang ((ma hoi) or (ma hoa)). lieu va lam duoc va thanh ca cua tre*.