Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
xach tay » canh tay
cham duc » pham duc, cham soc, pham duy
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
va hoa » van hoa, ma hoa
va hoc » van hoc
x hoi » xa hoi, o hoi, x ho

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 ((xach tay) OR (sach y)) nang x hoi. hieu ve cham duc van hanh ((va hoa) OR (va hoc)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((xach tay) or (sach y)) nang x hoi. hieu ve cham duc van hanh ((va hoa) OR (va hoc)) viet~".
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach y)) nang x hoi. hieu ve cham duc van hanh ((va hoa) OR (va hoc)) viet*.