Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
gian cac » gian dan, gian cua
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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: tu sach ty nang ma hoi. hieu ((gian cac) OR (vien bach)) ((xuc va) OR (tuc va)) hanh vi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu ((gian cac) or (vien bach)) ((xuc va) OR (tuc va)) hanh vi cua viet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu ((gian cac) or (vien bach)) ((xuc va) OR (tuc va)) hanh vi cua viet*.