Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, hieu ve
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
hanh va » hang va, hanh vi
su sach » so sach, vu sach
lam xuc » cam xuc, lam duoc
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa

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: su sach ty nang ma hoi. ((hieu van) OR (lieu va)) lam xuc van hanh va ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ma hoi. ((hieu van) OR (lieu va)) lam xuc van hanh va ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ma hoi. ((hieu van) OR (lieu va)) lam xuc van hanh va ((cua triet) or (cua viet))*.