Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
cham duc » pham duc, cham soc, pham duy
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
hieu vu » hieu ve, hieu su, dieu vu
tang ma » mang may, tang van
ty tang » tay tang, ty xang, ty hang
cua te » cua tu

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