Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach thu, xach tay
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sach tu » sach thu, cach tu, sach uu

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