Perhaps you should try some spelling variations:
thuat canh » thuat lanh, thuat cong, thuat san
canh tay » canh tac, thanh tay, anh ta
tang van » dang van, hoang van, trong van
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
tang ma » mang may
cua te » cua tu

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: thuat canh tay ((tang ma) OR (tang van)) hoa. hieu va cac duc va ((danh vi) OR (danh di)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat canh tay ((tang ma) OR (tang van)) hoa. hieu va cac duc va ((danh vi) or (danh di)) cua te~".
• Adding a wildcard symbol may retrieve word variants: thuat canh tay ((tang ma) OR (tang van)) hoa. hieu va cac duc va ((danh vi) or (danh di)) cua te*.