Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (su sach)) ky nang ((o hai) or (xa hoi)). hieu ve cam xuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((o hai) OR (xa hoi)). hieu ve cam xuc va hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((o hai) or (xa hoi)). hieu ve cam xuc va hanh vi cua viet*.