Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
dau truc » cau truc, dai truc, doan truc
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
van dau » van dao, phan dau
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
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: tu ((sach ky) or (((sach ty) OR (sach tu)))) nang xa hoi. hieu van dau truc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (((sach ty) OR (sach tu)))) nang xa hoi. hieu van dau truc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (((sach ty) OR (sach tu)))) nang xa hoi. hieu van dau truc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (((sach ty) OR (sach tu)))) nang xa hoi. hieu van dau truc va hanh vai cua tre*.