Perhaps you should try some spelling variations:
thien van » thi van
van hanh » van thanh, ban hanh, van anh
bach van » bach dan, cach van, bach dang
sach van » sach han, sach va, cach van
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
su bien » su kien, su hien, su tien
ma hoi » mai hoi, xa hoi, ma hoa
vi su » va su, ve su, ki su

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 ((sach van) OR (bach van)) nang ma hoi. ((hieu ve) OR (thien van)) cam xuc van hanh vi su bien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach van) OR (bach van)) nang ma hoi. ((hieu ve) or (thien van)) cam xuc van hanh vi su bien~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach van) OR (bach van)) nang ma hoi. ((hieu ve) or (thien van)) cam xuc van hanh vi su bien*.