Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
van hoc » van hoa
van hoe » van hoa, van hieu, van hien
hieu va » lieu va, hieu qua
lam xuc » cam xuc, lam duoc
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ((van hoc) or (van hoe)). ((hieu van) OR (hieu va)) lam xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((van hoc) OR (van hoe)). ((hieu van) OR (hieu va)) lam xuc van hanh vi cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((van hoc) or (van hoe)). ((hieu van) OR (hieu va)) lam xuc van hanh vi cua viet*".