Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
van thanh » ban thanh, van tuan
cao xuan » dao xuan, cao quan, ngo xuan
thanh vi » hanh vi, thanh va, thanh ve
thu sach » thuat sach, thuoc sach, thu hoach
nang mai » nang ma, nang tai, lang mai
xuan van » luan van, quan van, xuan can
tu sach » su sach, te sach, tu cach
hieu va » hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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: ((tu sach) OR (thu sach)) y nang mai hoi. ((hieu va) OR (lieu va)) cao xuan van thanh vi cua thuoc~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang mai hoi. ((hieu va) or (lieu va)) cao xuan van thanh vi cua thuoc*.