Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lam xuc » cam xuc, lam duoc
cua tre » cuu tre, cua triet, dua tren
sach tu » sach thu, cach tu, sach ty
xuc ban » duc ban, cuc ban, quoc ban
hieu va » lieu va, hieu qua
hanh ma » hanh mau, hanh may, hanh va
tu hanh » du hanh, lu hanh, thuc hanh
va lam » van lam, va lap
ma hoi » mai hoi, xa hoi, ma hoa
anh vi » anh va, anh ve, anh vu
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: tu sach tu hanh ma hoi. hieu va lam xuc ban ((anh vi) or (hanh vi)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu hanh ma hoi. hieu va lam xuc ban ((anh vi) OR (hanh vi)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach tu hanh ma hoi. hieu va lam xuc ban ((anh vi) or (hanh vi)) ((cua tre) or (cua te))*.