Perhaps you should try some spelling variations:
thien van » thi van
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, lieu va
hieu ve » hieu va
sach ty » sach y, sach tu, sach thu
xuc van » duc van, luc van, vuc van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
tu sach » thu sach, su sach, te sach
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 ty nang ma hoi. ((hieu ve) OR (((hieu van) OR (thien van)))) cam xuc van thanh vi su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam xuc van thanh vi su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. ((hieu ve) or (((hieu van) OR (thien van)))) cam xuc van thanh vi su triet*.