Perhaps you should try some spelling variations:
dat duoc » dat nuoc, da duoc, luat duoc
tu cach » tu cac
cach tu » cach thuc
tu dang » thu dang, tu dong, su dang
dang ma » dang mau, dang mam, dang mat
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cuc tre » duc tre, cua tre, cuu tre
ve dat » de dat, va dat, ve dao

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 cach tu dang ma hoa. hieu ve dat duoc ((va hanh) OR (va danh)) tai cuc tre~.
• Adding a wildcard symbol may retrieve word variants: tu cach tu dang ma hoa. hieu ve dat duoc ((va hanh) or (va danh)) tai cuc tre*.