Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua dieu
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu vi » hieu voi, hieu va, hieu ve
vi nham » vi pham, vi tham, voi nhat
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ma hoi. hieu vi nham thuc va hanh vai ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoi. hieu vi nham thuc va hanh vai ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ma hoi. hieu vi nham thuc va hanh vai ((cua viet) or (cua vat))*.