Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
luat duoc » luat tuc
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, lam thuoc, tao duoc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
lam xuc » cam xuc
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
vi cuu » vi luu, vinh cuu

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 sang ma hoi. hieu van ((lam xuc) or (((lam duoc) or (luat duoc)))) ban thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ma hoi. hieu van ((lam xuc) OR (((lam duoc) OR (luat duoc)))) ban thanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ma hoi. hieu van ((lam xuc) or (((lam duoc) or (luat duoc)))) ban thanh vi cuu tre*.