Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
va kinh » qua kinh
sach ky » sac ky, sach y, sach kem
nam xuc » cam xuc, nam xua, nam thuc
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
va cuu » va cau, va chu, va huu
x hoi » xa hoi, o hoi, x ho

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: te ((sach ky) OR (sach ty)) nang x hoi. hieu van nam xuc ((va kinh) OR (va tinh)) va cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang x hoi. hieu van nam xuc ((va kinh) or (va tinh)) va cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) nang x hoi. hieu van nam xuc ((va kinh) or (va tinh)) va cuu tre*.