Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
giao cua » gian cua, gia cua, giau cua
sach ky » sac ky, sach ty, sach kem
va tinh » may tinh
va hinh » va chinh, va kinh, va sinh
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
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: tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cac du ((va hinh) or (va tinh)) giao cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cac du ((va hinh) OR (va tinh)) giao cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cac du ((va hinh) or (va tinh)) giao cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang x hoi. hieu ve cac du ((va hinh) or (va tinh)) giao cua viet*.