Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh va, hanh tai, hanh van
thuc dan » thuc hanh, hoc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve nam » he nam, va nam, le nam

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 xa) OR (nang x)) hoi. hieu ve nam thuc dan ((hanh vai) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. hieu ve nam thuc dan ((hanh vai) OR (hanh vi)) cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (nang x)) hoi. hieu ve nam thuc dan ((hanh vai) or (hanh vi)) cua viet*".