Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
sach ky » sac ky, sach ty, sach kem
van cau » van dau, van hau, van chat
lang xa » lang ha, dang xay, lang van
xac va » tac va, ac va, bac va
vi cua » vai cua, di cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach y)) lang xa hoi. hieu van cau ((xac va) OR (thuc dan)) hanh vi cua te~.
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) or (sach y)) lang xa hoi. hieu van cau ((xac va) or (thuc dan)) hanh vi cua te*.