Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
vu khach » vu khanh, vu khac, vay khach
ve triet » su triet
dang xay » dang van, van xay
hai tuc » thai tuc, hai cuc, thai thuc
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
qua hai » qua hoat
tuc va » thuc va, truc va, tuc xa

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: ((vu sach) OR (vu khach)) ky dang xay hoi. hieu qua hai tuc va hanh vi ((ve triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) ky dang xay hoi. hieu qua hai tuc va hanh vi ((ve triet) OR (va trien))~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ky dang xay hoi. hieu qua hai tuc va hanh vi ((ve triet) OR (va trien))*.