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

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