Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
hanh va » hang va
tu sach » thu sach, su sach, te sach
lam xuc » lam duoc
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: tu sach ty nang ma hoi. hieu van ((lam xuc) OR (cam xuc)) van ((hanh va) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu van ((lam xuc) or (cam xuc)) van ((hanh va) OR (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu van ((lam xuc) or (cam xuc)) van ((hanh va) OR (hanh vi)) cua triet*.