Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
sang ma » tang ma, nang ma, sang tao
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
ac va » tac va, bac va, mac va

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang x) OR (sang ma)) hoi. hieu van cam ((ac va) OR (tuc va)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang x) OR (sang ma)) hoi. hieu van cam ((ac va) OR (tuc va)) hanh vi cua tre*.