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
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
lam xuc » cam xuc
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
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: te sach ty nang cao 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: te sach ty nang cao hoi. hieu van ((lam xuc) OR (((lam duoc) OR (nam duoc)))) ban thanh ve cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang cao hoi. hieu van ((lam xuc) or (((lam duoc) or (nam duoc)))) ban thanh ve cuu tre*.