Perhaps you should try some spelling variations:
thuat van » thuat san, thuat va, thuat ban
dang xay » dang van, van xay
cam truc » cau truc, nam truc, lam truoc
cua viet » ca viet, hoa viet, cua vat
lang xa » lang ha, lang van
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
va cam » va cham, va cac, va cao
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: thuat van ky ((lang xa) OR (dang xay)) hoi. hieu va cam truc va danh vi cua viet~.
• Adding a wildcard symbol may retrieve word variants: thuat van ky ((lang xa) or (dang xay)) hoi. hieu va cam truc va danh vi cua viet*.