Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
lam duoc » nam duoc, luat duoc, lam thuoc
lam xuc » cam xuc
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
vi cau » va cau, ve cau, di cau
tu sac » tu cac, tu san, tu bac

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 sac) OR (tu sach)) ky nang ma hoi. hieu van ((lam xuc) OR (lam duoc)) ban thanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang ma hoi. hieu van ((lam xuc) or (lam duoc)) ban thanh vi cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang ma hoi. hieu van ((lam xuc) or (lam duoc)) ban thanh vi cau tren*.