Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 ty) OR (sach tu)) nang x hoi. hieu ((ve cam) or (va cam)) xuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) nang x hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach tu)) nang x hoi. hieu ((ve cam) or (va cam)) xuc va hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach tu)) nang x hoi. hieu ((ve cam) or (va cam)) xuc va hanh vi cua viet*.